When Using General-Purpose Communication Function - Panasonic AFP7CPS4E User Manual

10.2.3 When Using General-purpose Communication Function

 What to do if an error occurs
Situation
Communication is not
possible.
(For the serial
communication unit, the
ERROR LED turns on.)
Transmission is not
possible.
(For the serial
communication unit, the
ERROR LED turns on.)
Transmission is not
possible.
Reception is not possible.
(For the serial
communication unit, the
ERROR LED turns on.)
(Note) For checking communication parameters with PMGET instruction, the CPU should be set in the RUN mode.
Set "Mode selection when self-diagnostic error occurs - A unit error occurred." to "Continue operation" in the
CPU configuration.
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Contents to check
Is a communication cassette attached?
Are wirings correct?
Isn't there any problem in environments such as
noise?
Is the communication mode set correctly?
Does an operation error occur when GPSEND
instruction is executed?
Isn't transmission prohibited by CTS signal (Y14
or Y16) when using a communication cassette
with RS-232C (5-wire type)?
Is the setting for the communication conditions
the same as the one for the device
communicated?
Is the setting of the method for detecting
"reception done" the same as the one for the
device communicated?
Isn't reception error occurring?
Isn't the reception buffer FULL error occurring?
If the error occurs, the operation cannot be
restarted without performing channel reset.
Isn't the operation mode set to a mode other
than general-purpose communication with
PMSET instruction?
10.2 What to DO If an Error Occurs
(For Each Communication Mode)
Confirmation method
Check if the communication block is
installed firmly.
Check the wirings again.
Check the shielding.
・Check the configuration (COM
settings) of the CPU with built-in SCU
or the serial communication unit.
・Check the communication
parameters with PMGET instruction.
(Note)
Review the program.
・Check the configuration (COM
settings) of the CPU with built-in SCU
or the serial communication unit.
・Check the communication
parameters with PMGET instruction.
(Note)
・Check the communication
parameters and operation status
monitor information with PMGET
instruction. (Note)
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