Danfoss 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
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.
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.
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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
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Danfoss 800 IO Offline Troubleshooting [pdf] User Guide 820, 080Z4004, 101C, 101A, 0063, 0061, 800 IO Offline Troubleshooting, 800 IO Offline, Troubleshooting |