IQ plus® 310A Digital Weight Indicator

Software Revision 5.0 — Summary of New Features

Serial Data

• Separate ticket formats for EDP and Printer ports.
• Printing in upper, lower, or mixed case letters from either port.
• Ticket printing from EDP port while Printer port streams in continuous mode.
• New SYNC selection to synchronize serial streaming with display update rate.
• Toledo 8142 and 8142CK data formats are now standard.
• New printer selection interfaces for TM-290 and TM-295 printers in normal or inverted page mode.
• New termination selection, LF, for printers requiring only a line feed and no carriage return.

Keyboard Operation

• Lockouts to individually disable ZERO, TARE, UNITS, and PRINT keys.
• Global lockout to disable entire keyboard.

Remote Operation Through EDP Serial Port

• New EDP remote commands for all new features.
• New RESPOND parameter suppresses EDP response for higher speed operation.
• New DEMAND mode for serial ports allows starting and stopping serial output with remotely-entered EDP commands.
• New EDP remote commands to transmit current display content and single serial strings.

New Digital Filtering Settings for Faster Display Stabilization

• New threshold and sensitivity settings allow fast indicator reaction time while using heavy filtering to eliminate vibration effects.

New Serial Data Format for Allen-Bradley Remote I/O Interface

• New REMOTE setting under FORMAT parameter allows data compatibility with the Allen-Bradley Remote I/O interface option.

1. Introduction

1.1 Overview of the IQ plus 310A

The IQ plus 310A is designed for easy installation and can be configured and calibrated entirely from its front panel. When the unit is in SETUP mode, accessed via an external Operate/Setup Switch on the rear panel, the five front panel keys facilitate navigation through the system menus. A graphic roadmap of these menus is detailed in Section 3 of this manual.

The unit features two serial ports: a full duplex Electronic Data Processing (EDP) port (RS232) for configuration, calibration, and remote operation via a keyboard or terminal, and a simplex, output-only Printer port (RS232 and 20-mA outputs).

Both serial ports can operate in continuous (STREAM or DEMAND) or TICKET mode. In STREAM or DEMAND modes, data can be continuously transmitted at rates up to 19,200 baud in various indicator formats (see Section 6.4). In TICKET mode, a special single-ticket data string can be transmitted to a ticket or roll-tape printer for customized weight tickets.

Two digital inputs are available for remote operation of any of the five front panel keys, keyboard lockout, or special display functions, compatible with dry contact switch closures or TTL logic level input.

The IQ plus 310A offers custom recessed panel-mounting or wall/bench mounting with a rugged tilting stand. Its unique digital filtering, with programmable threshold and sensitivity, ensures dependable operation in high vibration and electrically noisy environments.

The indicator can drive up to six 350Ω load cells. Selectable Auto Tare or In/Out Tare functions provide flexibility for various weighing operations.

An Operator's Instruction Card, with either Auto Tare or In/Out Tare instructions, is included with the manual. After installation and certification, a legal seal locks the unit in OPERATE mode to prevent tampering and ensure continued accuracy.

Front Panel Description: The front panel of the IQ plus 310A features a digital display, annunciators, and five control keys. The display shows weight readings and status information. Annunciators indicate modes like NET, GROSS, TARE, and units (lb, kg). The keys are labeled ZERO, GROSS/NET, TARE, UNITS, and PRINT. There are also indicators for serial number (S/N), capacity (CAP), and maximum weight (max). An 'Entry Mode' indicator is also present.

1.2 Panel Display Annunciators

The IQ plus 310A features several annunciators on its front panel display to indicate the current status and mode of operation:

• PT (Tare Acquired): A tare weight has been acquired and stored by the system.
• PT (Preset Tare): A preset tare weight has been keyed in and entered via the EDP serial port.
• Solid Rhombus (♦): Tare acquired via digital input.
• Blinking Rhombus (♦ blinking): Tare acquired or keyed in by EDP serial command.
• Scale Standstill (◪): Indicates the scale is in standstill, or not in motion.
• NET: Indicates NET weight mode.
• B or G: Indicates Gross (Brutto) weight mode (selectable).
• Minus Sign (-): For a 7-digit number, the minus sign is formed by the middle bar of the digit to the left of the number.
• Center of Zero (↔0↔): Indicates GROSS or NET weight is within ±0.25 display divisions of 0.
• lb: Pound weight unit.
• kg: Kilogram weight unit.
• Entry Mode: Indicates that the rear panel switch is in the SETUP position.

1.3 Keyboard Functions

The IQ plus 310A's five front panel keys have different functions depending on the operating mode: Operate or Setup. The mode is selected by a switch on the rear panel.

Operate Mode Key Functions:

• ZERO: Sets scale to display '0' in Gross mode, within zero band range.
• GROSS/NET: Toggles between Gross and Net weight display.
• TARE: Performs 'Auto Tare' or 'Tare In/Out' functions as selected in the Setup Menu.
• UNITS: Toggles between 'lb' and 'kg' units if selected in the Setup Menu.
• PRINT: Sends 'Print' data to printer when scale is not in motion and Gross weight is between 0 and full scale.

Setup Mode Key Functions:

In Setup mode, the keys are used for menu navigation and selection:

• ZERO: Moves UP in the menu.
• GROSS/NET: Moves DOWN in the menu.
• TARE (ENTER): Enters selection.
• UNITS: Moves LEFT in the menu.
• PRINT: Moves RIGHT in the menu.

For numerical entries, the left/right arrow keys select the digit to change, and the up/down keys increase or decrease its value. Pressing TARE stores the entry and advances to the next parameter.

Setup Test Mode Key Functions:

The Test mode, accessible only from Setup mode (see Section 3.4), provides unique functions for the keys:

• ZERO: Displays a scrolling alphanumeric sequence; the EDP port continuously transmits 'U'.
• GROSS/NET: Indicates the active Digital Input ('DIN-1' or 'DIN-2').
• TARE: Displays 'SERI-X', where X is a capital letter received from the EDP port.
• UNITS: Displays software revision.
• PRINT: Exits the TEST menu.

2. Installation

2.1 Overview

This section provides detailed installation procedures for the IQ plus 310A hardware. Following the steps in order ensures a logical and straightforward process.

2.2 Checking the Accessory Kit

Upon unpacking the IQ plus 310A, an accessory kit will be found containing the following items:

• Capacity Strip Label (blank): 1
• Weight Unit Label Set: 1
• Cable Tie: 2
• Drilled Standoff: 2
• Berg Style Jumper: 1
• Screw, 1/4-20 x 1/2": 2
• Setup Switch Cover Plate (w/gasket): 1
• Hole Plug: 1
• AC Cable: 1

2.3 Removing the Case

The unit's case must be removed to access electrical connections and install front panel labels. The case is secured by four cap nuts (14 for NEMA 4 models). Remove and save these nuts, then slide the unit out carefully to avoid damaging gaskets. With the case removed, cable routing paths and terminal blocks for load cell and serial communications cables become accessible.

Rear View of IQ plus 310A (Figure 2 Description): This diagram shows the back of the IQ plus 310A indicator. Key components visible are the Load Cell Cable Fitting, Communications Cable Fitting, AC Power Connector (IEC Receptacle), and the Setup/Operate Switch. The locations for the 8-32 Cap Nuts (4 on standard model, 14 on NEMA 4 model) are also indicated.

2.4 Making Power Connections

The IQ plus 310A is an AC-powered unit with no on/off switch; it powers up when connected to a power source. The power connector requires a three-contact connector with a ground connection for safety. Before connecting, verify the voltage rating on the rear panel label matches local voltage and adjust jumper settings if necessary. The IQ plus 310A supports 115 VAC or 230 VAC, determined by jumpers JP1, JP2, and JP3 on the power supply board.

Top View with Case Removed (Figure 3 Description): This diagram illustrates the internal layout of the IQ plus 310A with the case removed. It shows the Power Receptacle, Communications Cable, Load Cell Cable, Power Supply Board, Main Circuit Board, Communications Cable Terminal Block (J4), Load Cell Terminal Block (J3), and a Cable Tie securing the communications cable.

Power Supply Board (Figure 4 Description): This diagram shows the layout of the power supply board, including fuses (F1, F2), capacitors (C1, C11, C8), a transformer, and jumper locations (JP1, JP2, J2, JP3). These jumpers are used to set the AC voltage.

AC Voltage Jumpers (Figure 5 Description): This diagram details the jumper settings for 115 VAC and 230 VAC. For 115 VAC, jumpers are placed across JP1 and JP2. For 230 VAC, jumpers are placed across JP2 and JP3. Dual fuses on the power supply board may also need replacement based on voltage (specifications in Section 7.1).

2.5 Connecting Load Cell Cable

The load cell cable connects to a plug-in terminal block (J3) on the main circuit board. The IQ plus 310A is shipped configured for 4-wire load cell connections (JP1 and JP2 on main board jumpered). For 6-wire connections using sense leads, remove these two jumpers. The cable should retain its original length for temperature compensation. Connections at J3 should be made as per Figure 6, and the cable fitting tightened.

Load Cell Connections (Figure 6 Description): This table details the pin assignments for the J3 Load Cell terminal block:

2.6 Connecting Communication Cable

The serial communications cable connects to a plug-in terminal block at J4 on the main circuit board. Use only one shielded cable for all signal connections, including digital inputs. Remove the factory-installed hole plug from the fitting and install the communications cable. Loosen the cable fitting, insert the cable to reach J4, prepare wires and shield, connect to J4 (see Figure 8 for J4 location), install a cable tie (as in Figure 3), and tighten the cable fitting.

Communications Connections (Figure 7 Description): This table details the pin assignments for the J4 Communications terminal block for EDP Port (RS232), Printer Port (RS232), and Printer Port (20-mA CL):

Main Circuit Board (Figure 8 Description): This diagram shows the main circuit board with various components and connectors. Key elements include J3 (Load Cell), JP1, JP2, J4 (Input/Output), J2, Microprocessor (U1), and fuse locations (F1, F2). Caution notes regarding fire risk, electric shock, and fuse replacement are also present.

2.7 Installing Labels

The accessory kit includes a blank capacity strip, alternate weight unit labels, and three key labels.

2.7.1 Capacity Strip

The capacity strip, a flexible plastic piece for recording scale capacity and serial number, is inserted into a channel along the top of the front panel. It should be typed or written in indelible ink. To install: stand the IQplus 310A on its left side with the rear facing you. Note the different ends of the strip (back end bent for removal, front end trimmed for easier loading). Hold the strip just behind the front end (removal tab up, printed side facing front). Feed the front end over the display board into the loading slot. Wiggle the strip left and right while gently pushing it in. Continue feeding until it stops, with the removal tab extending about 5/8 inch from the front panel. Crease the removal tab back to avoid interfering with the gasket seal.

Caution: Do not force the capacity strip into the channel, as this may crease it.

Installing Capacity Strip (Figure 9 Description): This diagram illustrates the process of installing the capacity strip. It shows a rear view of the front panel with the loading slot, and a side view demonstrating how the capacity strip is fed into the slot, positioned between the display board and the flexible switch panel.

2.7.2 Weight Unit Labels

Supplied weight unit labels can be applied over existing 'lb' and 'kg' labels on the front panel. A transparent label is provided for custom units; print the custom label on adhesive stock and laminate it to the transparent label, then trim to size.

2.7.3 Key Labels

The 'TEST' key label should be applied over the 'UNITS' key when the international keyboard layout is selected. A black label is for 'TARE' or 'UNITS' if locked out. A transparent label can be used for custom functions or laminated to black label stock for a 'blackout' key.

2.8 Replacing the Case

Before replacing the case, ensure all cables are dressed and connected, jumpers JP1 and JP2 are correctly installed/removed, the chassis is clean, and the capacity strip is properly installed with tabs folded away from gaskets. To install: slide the case onto the unit carefully, ensuring the capacity label does not interfere with the gasket seal. Install one drilled standoff at position 6 and hex/cap nuts at all other positions (standard model has 4 threaded studs, NEMA 4 model has 14). For standard models, tighten nuts and standoff slightly to compress gaskets. For NEMA 4 models, use the tightening sequence shown in Figure 10, tightening #8-32 small pattern hex nuts and the drilled standoff by small increments to ensure even gasket compression and a watertight seal (final torque 4 lb-in).

Case Installation (Figure 10 Description): This diagram shows the top view of the IQ plus 310A with the case being installed. It indicates the positions of the cap nuts (numbered 1-14) and the drilled standoff (position 6), along with the recommended tightening order for the NEMA 4 model to ensure a watertight seal.

2.9 Mounting the Indicator

The IQ plus 310A can be flush-mounted in a panel using the Panel Mounting Accessory Kit (#19351) or mounted on a bench or wall using the Wall/Bench Mounting Accessory Kit (#19350).

2.9.1 Panel Mounting Procedure

To mount the IQ plus 310A into a panel:

1. Make a 7 3/8
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