Jetter JC-120MC, User Manual

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Jetter AG 397
JC-120MC Programming
Monitoring intervals on the JX2 system bus
The JC-120MC checks in regular intervals whether communication with the
modules connected to the JX2 system bus is still working. To this end, it sends
monitoring signals to the modules and waits for a response.
Register Description
R 210004
Error registers - JC-120MC
R 200002008 Error registers - JX2 system bus
R 200002011 I/O module number at timeout
R 200002028
Cycle time of monitoring interval
R 200002760 Max. number of I/O update retries
When monitoring JX2-I/O modules, a missing response will not immediately
result in a timeout error on the JC-120MC.
Step Description
1
The JC-120MC sends a monitoring telegram to a JX2-I/O module.
The cycle time can be configured in R 200002028.
2 If ... ... then ...
... a response has been received, ... the JC-120MC proceeds
monitoring the next JX2-I/O module
by taking step 1.
... no response has been received
and the number of allowed retries
has not been maxed out,
... the JC-120MC sends one more
monitoring telegram.
... no response has been received
and the number of allowed retries
has been maxed out,
... the JC-120MC generates a
timeout in step 3.
3 The JC-120MC generates a timeout:

The I/O module number is entered into R 200002011.

In R 200002008 bit 3 is set to 1.

In R 210004 bit 2 is set to 1.

The red error LED on the JC-120MC is lit.
4 The JC-120MC proceeds with step 1 for the next JX2-I/O module.
Introduction
Registers - Overview
Monitoring of
JX2-I/O modules