### External Device Settings

Use the PU/EXT key, MODE key, M dial and SET key in the operation panel of the CPU unit for External Device communication settings.

Refer to your External Device manual for details.

1. Turn ON the power supply.

2. Press PU/EXT key to select the PU operation mode.

3. Press MODE key to select the parameter setting mode.

4. Display the setting parameter number with M dial.

5. Press SET key to display the current setting value.

6. Set the setting value with M dial.

7. Press SET key to confirm the setting value.

Setting Parameter Number | Setting Value | Setup Description
--- | --- | ---
331 | 0 | RS-485 communication station
332 | 192 | RS-485 communication speed
333 | 1 | RS-485 communication stop bit length
334 | 2 | RS-485 communication parity check selection
335 | 1 | RS-485 communication retry count
336 | Any Except 0 | RS-485 communication check time interval
337 | 9999 | RS-485 communication waiting time setting
341 | 1 | RS-485 communication CR/LF selection
549 | 0 | Protocol selection

NOTE

- Always restart the External Device after changing parameters.