Mitsubishi Electric MELSEC iQ-R-R00CPU, User Manual

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37 FUNCTIONS
37.9 Safety Diagnostic Function
37.9
Safety Diagnostic Function
The following table lists the safety-specific diagnostic functions among the self-diagnostic functions for the SIL2 Process CPU.
*1 Self-diagnostics is performed in both the SIL2 Process CPU and SIL2 function module.
37.10
Safety Data Identify Check
This function checks if the project data created using the engineering tool and the data in the SIL2 Process CPU are the
same, and confirms that the program executed in SAFETY MODE is the one written by the user.
This function allows the user to inspect whether the files in the engineering tool and the SIL2 Process CPU match or not.
[Online]  [Safety PLC Operation]  [Check Safety Data Identity]
For details, refer to the following.

GX Works3 Operating Manual
Item
*1
Description Diagnostic timing Error code
Memory diagnosis RAM diagnosis Detects errors occurring at program memory,
device memory, and memory used by the system. • At powering off and on
• At reset
• At END processing 3C20H, 3C21H, 3C22H,
3C2FH, 3C33H
F/W diagnosis Diagnoses whether the firmware stored in the
ROM is corrupt. • At powering off and on
• At reset 3C10H
Program diagnosis Operation circuit
diagnosis Detects errors at operation circuits used to
operate safety programs. • At powering off and on
• At reset
• At END processing 3C15H
File verification Detects errors in stored safety programs and
safety parameters. • At powering off and on
• At reset
• At END processing 2180H, 36E1H, 3C33H,
3C34H
Diagnoses whether safety programs and safety
parameters stored in both the SIL2 Process CPU
and SIL2 function module are the same. • At powering off and on
• At reset 2180H, 3640H
Operation result
verification Output data
verification Verifies output results calculated in the respective
SIL2 Process CPU and SIL2 function module. At safety cycle processing 3E60H
System diagnosis Time monitoring Monitors the execution status of the respective
SIL2 Process CPU and SIL2 function module
processing. Always 3E61H
Microcomputer
diagnosis Detects microcomputer internal register errors. • At powering off and on
• At reset
• At END processing 3C00H, 3C01H
Power supply
voltage monitoring Power supply voltage
monitoring Detects voltage errors to prevent operation with
voltage outside the guaranteed operating range. Always

(Performs a shutdown.)
Power supply voltage
monitoring/shutdown
circuit diagnosis Monitors whether the circuit monitoring the power
supply voltage and circuit used to perform
shutdown are functioning properly. • At powering off and on
• At reset
• At END processing 3E10H, 3E11H
Reset circuit
monitoring Reset circuit
monitoring diagnosis Diagnoses whether the reset has been performed
correctly. • At powering off and on
• At reset 3E12H
Clock stop
detection Clock diagnosis Detects clock errors (frequency errors). • At powering off and on
• At reset
• At END processing 3C16H
CRC calculation
circuit diagnosis CRC calculation
circuit diagnosis Diagnoses whether the CRC calculation circuit is
capable of correctly calculating CRC. • At powering off and on
• At reset
• At END processing 3E01H
Module Module OS diagnosis Verifies whether the SIL2 Process CPU and SIL2
function module are functioning normally without
running out of control. • At powering off and on
• At reset
• At END processing 3C11H, 3C17H