Emerson CATALOG 5150 installation manual Connectivity Module Troubleshooting A-3, Problem Cause

Connectivity Module Troubleshooting A-3

Troubleshooting the Connectivity Module Listed below are possible problems, their causes, possible solutions

Problem	Cause
DIAG red light blinks rapidly then stays	Duplicate IP address. The IP address of one or more CMs
on when the CM is first powered up.	on the same network is set as same.
DIAG red light blinks slowly or stays on	Major software or communication failure.
after the CM is properly configured.
Message: Page not found.	Wrong or improper IP address and subnet. Problem with
	connections between CM, ATS Controller, PM, and/or
	DPM. Wrong configuration.
Message: No controller or power	Problem with connections between CM Module, ATS
manager has been found.	Controller, PM, and/or DPM.
Message: 72E baud rate and at least	Baud rates of CM, ATS Controller, PM, and/or DPM are
another device baud rate are	different.
mismatched (or similar message).
Message: Communication error stays	Lost connections.
on. (RX light is blinking & TX light is
off).
Message: Communication error	Busy network or lost connections
comes on then goes off by itself.
LINK light is off	Invalid network
	- ATS or PM are not configured for Modbus protocol
	- ATS or PM are not configured with the same baud rate
	as the CM
	- ATS or PM are configured with the same serial address
	- For 4-wire communication, ATS was not configured for
	4-wire mode
	- For 2-wire communication, ATS was not configured for
4-wire / 2-wire Modbus	2-wire mode
	- For 2-wire communication, CM 2-wire DIP switch was not
communication problem	enabled
	- For 2-wire communication, 2-wire mode was not enabled
	at the CM configuration page
	- Modbus master is not requesting the correct set of
	holding registers
	- Modbus master requesting more holding registers than
	the CM can handle
	- Modbus master reply timeout may be too short
	- Modbus master using incorrect CM IP address or TCP
	port
Intermittent loss of	CM disconnects the client because client was inactive / idle
communication / connection	(stops sending requests longer than 10 seconds)
AES enable client getting incorrect	Incorrect CM configuration settings:
	- AES is not enabled
response or no response from the CM.
	- Incorrect AES port

Solution

Unplug the Ethernet cable from all CMs. Follow the instructions from the appropriate configuration section to change to a proper IP address. Reconnect this CM to the network. The red DIAG light should blink then go off. Repeat this procedure for all other CMs one by one. Press Reset button on CM. If condition still exists, call your local ASI representative. Try to refresh the page again. If you get the same results, verify the IP address and wiring by pinging the device.

Check wiring then press Reset button on CM.

If 7000 or 4000 Series ATS, set baud rate of all the devices to 19200.

If Series 300 or ASCO 940/962, set baud rate of all the devices to 9600.

Check connections

Increase reply time out.

Check if it is a proper IP address. Check the Ethernet cable and connections.

-Make sure ATS and PM are configured with: Modbus protocol

the same baud rate as CM the correct serial I/F setting

(4-wire/2-wire) unique serial addresss

-For 2-wire communication, make sure to configure the CM serial I/F setting for 2-wire mode at the configuration page; and to enable its 2-wire DIP switch

-Modbus master should refer to doc. 381339-221 for the ATS and PM holding registers.

-Modbus master must use appropriate relay timeout (usually starting with 1000 ms) and to consider using retries (3 recommended) before calling for communication error.

-Modbus master must request a maximum of 12 holding registers from the ATS controller & 24 from the PM

-Modbus master connect to the same IP address and TCP port assigned to CM

-Check serial wiring connection between ATS/PM and the CM

When client connects to the CM, it should never stop communicating (sending request) at all times. When CM detects inactivity from the connected client (from its last request) longer than 10 seconds, the CM will automatically disconnect it. That client must then reconnect to resume communication.

Provide correct CM AES configuration settings

ATS = automatic transfer switch, CM = Connectivity Module, DPM = Digital Power Meter, PM = Power Manager