Mitsubishi Electric QJ71MB91 User Manual page 326

11
TROUBLESHOOTING
(2) Count range
(3) Clearing the diagnostic counters
(4) Cautions
11
- 20 11.3 Checking the Communication Status of QJ71MB91
Counting is performed up to FFFF
Counting is stopped when the count reaches FFFF
To continue counting, clear the diagnostic counter.
( This section (3))
The diagnostic counters can be cleared by any of the following methods:
(a) Diagnostic counters for Master function (
• Power OFF
• Resetting the programmable controller CPU
(b) Diagnostic counters for Slave function (
• When receiving the Clear Counters and Diagnostic Register
4.11.6)
• When receiving the Restart communications option
• When receiving the Clear Overrun Counter and Flag
( Section 4.11.6)
• Clearing the buffer memory to "0" by sequence program
• Power OFF
• By resetting the programmable controller CPU
* 1 The Message discard count, Data discard count and Failed transmission count are not cleared.
* 2 Only the Character overrun error count is cleared.
Diagnostic counters are not cleared while the QJ71MB91 is sending data.
Use the values of the diagnostic counters for checking the communication status.
.
H
ON
ON
.
H
This section (1)(a))
This section (1)(b))
*1
(
*1
( Section 4.11.2)
*2
Section