Detecting and removing errors
105542_en_05 PHOENIX CONTACT 155 / 198
In PLC / Modbus/RTU mode
ERR flash-
ing slowly
(1.4 Hz)
Double assignment of I/O MAP
address, two input modules
have the same I/O MAP address
in a network.
• The I/O MAP address of an input module may only appear once in
the network. Use the white thumbwheel to set different I/O MAP
addresses.
RAD ID changed
Example: the yellow thumb-
wheel setting has accidentally
been modified and the modifica-
tion has not yet been confirmed
via the SET button.
• Check the RAD ID setting on the yellow thumbwheel of the wireless
module.
• If necessary, set the correct RAD ID and press the SET button.
No Modbus communication
(only if watchdog is activated)
Example: the communication
line between the Modbus/RTU
controller and the master wire-
less module has been inter-
rupted.
• Check the communication line between the Modbus/RTU controller
and the master wireless module using RAD ID 01.
• Check the wiring of the RS-232/RS-485 connections on the wireless
modules.
• Check the serial interface settings (baud rate, parity, data bits, and
stop bits) for the wireless modules and serial terminal devices.
• Check whether the I/O extension module is properly snapped onto
the DIN rail connector.
• Use the PSI-CONF software to check if the wireless module is in
“PLC / Modbus/RTU” mode or in dual mode (see page 38).
• Press the SET button on the wireless module or carry out a power up
in order to read the station structure.
In “serial data” or “PLC / Modbus/RTU” mode
RX, TX off Wireless connection present,
but application does not trans-
mit any data.
• Check the wiring of the RS-232/RS-485 connections on the wireless
modules.
• Check the serial interface settings (baud rate, parity, data bits, and
stop bits) for the wireless modules and serial terminal devices (from
page 38 onwards).
Table 9-1 Detecting and removing errors: wireless module
LED,
wireless
module
Current state and possible
cause
Solution
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