CTI 062-00108, Installation And Operation Manual

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C T I 2552 Installation and O peration G uide
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Figure 13 Example I/O Configuration Chart
2.7 Checking Module Operation
First turn on the base supply power. If the module diagnostics detect no problems, the status indicator
on the front of the module will light. If the status indicator does not light (or goes out during operation),
the module has detected a failure. For information on viewing failed module status, refer to your
SIMATIC® TISOFT user manual. To diagnose and correct a module failure, refer to the next section
on troubleshooting.
You must also check that the module is configured in the memory of the PLC. This is important
because the module will appear to be functioning regardless of whether it is communicating with the
PLC. To view the PLC memory configuration chart listing all slots on the base and the inputs or
outputs associated with each slot, refer to your SIMATIC® or TISOFT Programming Manual. An
example chart is shown in the following figure.
In this example, the 2552 Module is inserted in slot 1 in I/O base 0. Data for channel 1 appears in
word location WX1, data for channel 2 appears in word location WX2, etc. For your particular
module, look in the chart for the number corresponding to the slot occupied by the module. If word
memory locations appear on this line, then the module is registered in the PLC memory and the module
is ready for operation.
If the line is blank or erroneous, re-check the module to ensure that it is firmly seated in the slots.
Generate the PLC memory configuration chart again. If the line is still incorrect, contact your local
distributor or CTI at 1-800-537-8398 for further assistance.