Mitsubishi Electric MELSEC Q Series Reference Manual page 16

7 APPLICATION FUNCTIONS
7.1 Transient Transmission Function (Non-Periodical Communication) ................................................. 7- 2
7.1.1 Link dedicated instruction ............................................................................................................. 7- 3
(1) Reading/writing remote I/O station intelligent function module buffer memory
(Z(P).REMFR/ Z(P).REMTO) ................................................................................................ 7- 3
7.2 Remote I/O Station System Monitor ................................................................................................... 7- 9
7.3 Device Test for Remote I/O Station ...................................................................................................... 7-10
7.4 Multiplex Transmission Function (Optical Loop System) ..................................................................... 7-12
7.5 Return Sequence Station Number Setting Function ............................................................................ 7-13
7.6 Reserved Station Function .................................................................................................................... 7-13
7.7 Interrupt Settings ................................................................................................................................... 7-14
7.8 I/O Assignment Function ....................................................................................................................... 7-15
7.9 Stopping/Restarting the Cyclic Transmission and Stopping Link Refreshing (Network Test) ............ 7-16
7.10 Multiplexed Remote Master Function (Process CPU) ....................................................................... 7-17
7.11 Multiplexed Remote Master Function for the Redundant System (Redundant CPU) ...................... 7-32
7.11.1 Backup function of master operation on system switching between control system and
standby system ................................................................................................................................ 7-34
7.11.2 Master operation by the station that has started up as the control system ................................ 7-35
7.11.3 System switching request function of control system ................................................................. 7-36
7.11.4 Access function by specifying the control system or standby system ........................................ 7-39
7.12 Remote password ............................................................................................................................... 7-40
8 TROUBLESHOOTING
8.1 Network Diagnostics (Network Monitor) ............................................................................................. 8- 2
8.1.1 Host information ........................................................................................................................... 8- 5
8.1.2 Other station information .............................................................................................................. 8- 7
8.1.3 Network monitor details ................................................................................................................ 8- 9
8.1.4 Error history monitor ....................................................................................................................... 8-12
8.2 Troubleshooting ..................................................................................................................................... 8-15
8.2.1 Items checked first .......................................................................................................................... 8-21
8.2.2 Items checked when data link cannot be performed throughout the system ................................ 8-21
8.2.3 Items checked when data link is disabled by resetting or powering off a station .......................... 8-22
8.2.4 Items checked when cyclic data is 0 by resetting or powering on a station .................................. 8-22
8.2.5 Items checked when data link cannot be performed on a certain station ..................................... 8-23
8.2.6 Items checked when an communication data error is detected .................................................... 8-24
8.2.7 Items checked when a link dedicated instruction does not complete ............................................ 8-24
8.2.8 Items checked when multiplexed remote I/O network for redundant system does not operate
normally ........................................................................................................................................... 8-25
8.2.9 Items checked when a minor error (continue error) on a remote I/O station cannot be detected
......................................................................................................................................................... 8-25
8.2.10 Checking incorrect optical fiber cable connection during online .................................................... 8-26
8.3 Error Codes ........................................................................................................................................... 8-29
8.3.1 How to check error codes .............................................................................................................. 8-29
8.3.2 MELSECNET/H error code list ....................................................................................................... 8-35
8.3.3 Error codes detected on remote I/O stations and equivalent to CPU module error codes .......... 8-44
8.4 Canceling a Minor Error (Continue Error) on a Remote I/O Station .................................................... 8-53
8.4.1 Canceling a specific remote I/O station error ................................................................................ 8-54
A - 14
7- 1 to 7-44
8- 1 to 8-61
A - 14