800 IO Offline Troubleshooting
“
Product Specifications
- Model: AK-SM 800IO Offline Troubleshooting
- Power Requirement: 24Vac/dc for communication module
- Addressing: AK2 Module Format uses 3 numbers
- Communication Module Type: AK-CM 101C, AK-CM 101A
- Wiring: LON wiring is not polarity sensitive; Modbus wiring is
polarity sensitive
Product Usage Instructions
Online Check
1. From Network Nodes screen, go to ‘Config Status’ tab.
2. Each line item indicates a single module/controller.
3. Verify all programmed modules are online.
IO Communication Issues
Initial Checks:
- Power: Ensure the module exists, check rotary switch, and
correct module type. - Checks: Ensure proper channel is enabled.
- Wiring Issues: Consider polarity, EOL resistors,
daisy-chaining, and termination methods.
Power
1. Use 24Vac/dc for the communication module.
2. Solid green indicator at the top indicates power is okay.
3. Individual Power LED on each module.
4. Communication module requires connection to the second module
to power.
Addressing
AK2 Module Format: Uses 3 numbers for
addressing.
Alternative Formats:
- Calculated: ‘CA-XX’ format.
- Case Controllers: 1 number.
- Legacy IO (AKCe ss): 2 numbers.
Does Module Exist?
Communication Module:
– Up to 9 modules of any combination can be connected to one
Communication Module.
Communication Module Rotary Switch
– Use 3 Rotary Dials to determine the address.
– Addresses cannot be duplicated.
Communication Module Type
- Controller types include AK-SM 850, AK-SM 880, AK-SM 880R.
- Native Communication Module Type: AK-CM 101C, AK-CM 101A.
Wiring – Polarity
– LON wiring is not polarity sensitive (TP78 or RS485).
– Modbus wiring is polarity sensitive.
Term Switches and EOL Resistors
– AK-SM at end of loop Term Switch = On.
– AK-SM in middle of loop Term Switch = Off.
FAQ (Frequently Asked Questions)
Q: What should I do if a full row of modules is offline?
A: In such a case, the communication module should be changed as
well. Replace modules one at a time to identify the one affecting
others.
Q: How do I address the modules?
A: Use the rotary switches and follow the addressing guidelines
provided in the manual for accurate addressing.
“`
AK- SM 800 I O Offline Troubleshoot ing
1 | Department (slide master)
AX279128111283en-000101
Online Che ck
1. From Net work Nodes screen go t o `Config St at us’ t ab 2. Each line it em indicat es a single m odule/ cont roller 3. Verify all program m ed m odules are online
2 | Department (slide master)
I O Com m unica t ion I ssue s
I nit ia l Che ck s Power Does m odule exist? Com m m odule rot ary swit ch Proper com m m odule t ype?
AK- SM 8 0 0 Che ck s Proper channel enabled?
W iring I ssues Does polarity matter? EOL resist ors Daisy-chaining and 800 term ination Type of wire used
Pr oble m Cor r e ct ion Rescan
3 | Department (slide master)
Pow er
1. 24Vac/ dc required for com m m odule* 2. Solid green indicator at top if power ok 3. I ndividual Power LED on each m odule as well 4. Com m m odule requires connect ion t o 2nd m odule t o power
* Will power at lower voltages ( i.e. 12V) , but will not bring connected m odules online
4 | Department (slide master)
Ad d r essin g
AK2 Module Form at Uses 3 Num bers Alternative Form ats
Ca lcula t e d- `Ca – XX’ for m a t Ca se Cont r olle r s- 1 N um be r Le ga cy I O ( AKCe ss) – 2 N um be r s
5 | Department (slide master)
Does Module Exist ?
Comm. Module
Up to 9 modules of any combination connected to 1 C.M.
Analog Inputs 1 2 3 4 5 6 7 8
Analog Inputs 1 2 3 4 5 6 7 8
Analog Inputs 1 2 3 4 5 6 7 8
Module 1
Module 2
Module 3
1 2 3 4 5 6 7 8 Digital Outputs
0 0 1
Set address using rotary switches
Comm. Module #1
1 2 3 4 5 6 7 8 Digital Outputs
1 2 3 4 5 6 7 8 Digital Outputs
IO Module #2 Digital Output #7
Bd – Pt
01 – 2.7
Note: “0” Key toggles decimal (“.”)
6 | Department (slide master)
Com m Module Rot ary Swit ch
3 Rotary Dials determ ine address First dial should alw ays be set to 0 Rem aining dials determ ine address for 8 0 0 To adjust dials after system is pow ered:
1 . Adjust dials to desired # ‘s 2 . Rescan system
* Addresses cannot be duplicated
7 | Department (slide master)
Com m Module Type
Con t r olle r
AK- SM 850 AK- SM 880 AK- SM 880R
N a t ive Com m Module Type AK- CM 101C
AK- CM 101C
AK- CM 101A
Part #
080Z0063 080Z0063 080Z0061
8 | Department (slide master)
Wiring- Polarit y
1. LON wiring is not polarit y sensit ive ( TP78 or RS485) 2. Modbus wiring is polarit y sensit ive 3. Ensure wire not incorrect ly landed on shield t erm inal
9 | Department (slide master)
Term Swit ches and EOL Resist ors
1 . AK- SM at end of loop Term Sw itch = On
1 . AK- SM in m iddle of loop Term Sw itch = Off
10 | Department (slide master)
* Resistors now ship loose in bag
Final Checks/ Problem Correct ion
Fina l Che ck s I f nothing found with other checks, replacing offline m odule(s) is final step I f full row of m odules is offline, com m m odule should be changed as well Replace m odules one at a t im e in case one m odule is affect ing ot hers Pr oble m Cor r e ct ion Once problem has been ident ified and correct ed, com plet e rescan
11 | Department (slide master)
Documents / Resources
 |
Danfoss 800 IO Offline Troubleshooting [pdf] User Guide 820, 080Z4004, 101C, 101A, 0063, 0061, 800 IO Offline Troubleshooting, 800 IO Offline, Troubleshooting |