Chapter 8 Troubleshooting - Hitachi HIDIC EH-150 Applications Manual

Chapter 8 Troubleshooting

Trouble
A slave does not get on-line even if the
slave is configured in the master.
A slave does not react on a command
from the PLC even if everything is
configured correctly.
Possible cause
Node address in configurator does not
match the actual node address.
Wrong offset address is used in the PLC
program for the specific slave.
High byte and low byte are swapped in
word data from Profibus-DP Master.
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Chapter 8 Troubleshooting
Action
Check the node address on the slave.
Check the input and output offset
addresses in the configurator to make
sure that the right address is used.
Swap the high byte and low byte in the
PLC program.