Mitsubishi QJ71MB91 - Page 323

11
TROUBLESHOOTING
11.3 Checking the Communication Status of QJ71MB91
11 - 18
9
PROGRAMMING
10
DEDICATED INSTRUCTIONS
11
TROUBLESHOOTINGAPPENDICESINDEX
* 1 The NAK count defined by the MODBUS protocol is stored in the Received NAK count.
Note that this count is different from the NAK LED on the QJ71MB91.
* 2 It does not count when the request message is sent by the MBREQ instruction.