Self-Diagnostic Function - Mitsubishi Electric R60AD8-G User Manual

10.9

Self-diagnostic Function

This function periodically monitors the operating status of the R60AD8-G, such as the MPU (operation processing unit)
operating status, power supply voltage status (overvoltage and undervoltage), safety communications status, and built-in
programs operating status, for any errors.
If an error is detected by the self-diagnostic function, digital operation values of all channels become the OFF value
(equivalent to 0V/0mA) and safety communications are stopped in the safety layer. If hardware failure (error code: 3001H) is
detected by the self-diagnostic function in the R60AD8-G (Main), a safety mutual monitoring error (error code: 3020H) occurs
in the R60AD8-G (Sub). If hardware failure is detected in the R60AD8-G (Sub), a safety mutual monitoring error (error code:
3020H) occurs in the R60AD8-G (Main).
List of self-diagnostic functions
Diagnostics Diagnostics
name
H/W diagnostic Verifies whether the MPU (operation
function processing unit) in the R60AD8-G operates
normally.
Power supply Monitors the power supply voltage in the
diagnostic function R60AD8-G, and when it detects an error,
stops the MPU operation and shuts down
the system.
Safety layer Monitors the status of safety
diagnostic function communications between the R60AD8-G
(Main) and SIL2 Process CPU.
F/W operation Monitors program operating status in the
monitoring function R60AD8-G.
*1  indicates that the function is applicable, and  indicates that the function is not applicable.
*2 The diagnostic function is executed immediately after power-on. For SIL2 analog input systems, it starts after start-up diagnostics is
complete. Due to the time needed for diagnostic functions, SIL2 analog input systems take more time to start up than normal systems.
*3 The diagnostic function is executed periodically after the SIL2 analog input system starts operating normally.
*4 An error code to be generated varies depending on the detection.
 If an error is detected in the send/receive data of the module, hardware failure (error code 3001H) is generated.
 If an error is detected in data link, no error code is generated. The error is logged in the event history.
*5 The power is not supplied to circuits such as microcomputers and the system is in the safety state.
The module is in the following state at system shutdown.
 On the GX Works3 system monitor, it is indicated that the module is not mounted.
 The RUN LED, ERR LED, ALM LED, and S MODE LED of the module turn off.
10 FUNCTIONS
290
10.9 Self-diagnostic Function
*5
*1
Diagnostic timing
*2
At start-up During
operation
 
 
 
 
Error to be
generated after
error detection
*3
Hardware failure (error
code: 3001H)
Hardware failure (error
code: 3001H)
*4
Hardware failure (error
code: 3001H)
Diagnostic
cycle
8 hours or less
8 hours or less
Every 12ms
Every 12ms