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3
SPECIFICATIONS
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(13) Current communication watchdog timer value
Stores the communication watchdog timer value set in the master station side
parameters.
The stored value is invalid if the I/O communication signal (X01) is off.
0
: Communication watchdog timer setting invalid
Other than 0 : Communication watchdog timer setting (in increments of 10ms)
When the master station becomes faulty, the send/receive data and I/O
communication signal (X01) statuses change depending on the communication
watchdog timer setting.
Statuses at master station fault
Send data to master station
Data update in output receive
area
I/O communication signal (X01)
1: The send data to the master station indicates the data that flows on the
PROFIBUS-DP actually. It differs from the data in the input send area of the
QJ71PB93D.
2: If the communication watchdog timer setting is invalid (This area is 0), the
data is retained since the communication watchdog timer does not count up
if the master station becomes faulty during communication.
(14) Self-diagnostic status type code display area (buffer memory
address 8D2
H
The diagnostic status type code at the time of self-diagnostics is stored.
The following type code can be confirmed during self-diagnostics or at abnormal
termination.
Status
During self-diagnostics
At normal termination
At abnormal termination
Refer to Section 5.6 for the way to run the self-diagnostics.
(15) Swapping function setting status
Stores the setting status of the swapping function set in the master station side
parameter.
The stored value while the I/O communication signal (X01) is on is valid.
0 : Without swap setting
1 : With swap setting
(buffer memory address 8D1
Current communication watchdog timer value (This area)
1
Retained
Retained
ON
: Un\G2258)
Type Code
0001
to 0009
H
H
0
H
8001
to 8006
H
H
8007
H
(buffer memory address 8D3
0
Other than 0
2
2
2
Description
During self-diagnostics
Normal termination
Hardware fault
Swap test error
MELSEC-Q
: Un\G2257)
H
Cleared
Cleared
OFF
: Un\G2259)
H
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