Other Precautions - Mitsubishi Electric MELSEC-A0J2H Series Handbook

8
REPLACING THE COMMUNICATION MODULES

8.7 Other Precautions

The following shows the precautions for replacing the A0J2-C214S1 with the Q series serial
communication module.
(1) Processing time
The A0J2H series and the Q series module have different data communication processing times.
For this reason, the data communication timing and related factors are different. Make adjustments as
needed to wait time.
Refer to each module's manual for definite processing times.
(2) Switch settings
When using the Q series serial communication module, always specify the mode, station number, and
transmission specifications at the intelligent function module switch setting of GX Works2 or the switch
setting of GX Developer.
(3) Data communication via the RS-422/485 interface
The precautions regarding data communication via the RS-422/485 interface are the same as with the
A0J2H series computer link module.
When the device on the other end receives incorrect data, attach pull-up or pull-down resistor to the
device on the other end. Refer to Section 3.3.3 of the Q Corresponding Serial Communication Module
User's Manual (Basic).
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