Commissioning and Diagnostics
6-20
ET 200S Distributed I/O System
EWA-4NEB 780602402-12
Serial interface module 1SI 3964/ASCII, 1SI Modbus/USS
SF
TX RX
LEDs
SF TX
Meaning Remedy
Hardware fault
Firmware error
Parameter assignment
error
Wire break or loose cable
between the module and
the communication
partner
1)
Communication error
Check the module.
Check the parameter
assignment. Evaluate the
diagnostic information.
Check the wiring.
Check the communication
settings.
on
on
The module is sending
data via the interface.
The module is receiving
data via the interface.
Status indicator
Group
error (red)
RX
on
1)
Only detected in the case of RS422 interface connections when the
default for the receive line is set to R(A) 5V/R(B) 0V
Figure 6-16 LEDs on the 1SI 3964/ASCII, 1SI Modbus/USS
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