Safety Diagnostic Function - Mitsubishi Electric MELSEC iQ-R-R00CPU User Manual

33.3

Safety Diagnostic Function

The following lists self-diagnostic functions specific to the Safety CPU.
*1
Item
Memory diagnosis RAM diagnosis
F/W diagnosis
Program diagnosis Operation circuit
diagnosis
File verification
Operation result Output data
verification verification
System diagnosis Time monitoring
Microcomputer
diagnosis
Power supply Power supply voltage
voltage monitoring monitoring
Power supply voltage
monitoring/shutdown
circuit diagnosis
Reset circuit Reset circuit
monitoring monitoring diagnosis
Clock stop Clock diagnosis
detection
CRC calculation CRC calculation
circuit diagnosis circuit diagnosis
Module Module OS diagnosis
*1 Self-diagnostics is performed in both Safety CPU and safety function module.
33 FUNCTIONS
542
33.3 Safety Diagnostic Function
Description
Detects errors occurring at program memory,
device memory, and memory used by the system.
Diagnoses whether the firmware stored in the
ROM is corrupt.
Detects errors at operation circuits used to
operate safety programs.
Detects errors in stored safety programs and
safety parameters.
Diagnoses whether safety programs and safety
parameters stored in both the Safety CPU and
safety function module are the same.
Verifies output results calculated in the Safety
CPU and safety function module.
Monitors the execution status of the respective
Safety CPU and safety function module
processing.
Detects microcomputer internal register errors.
Detects voltage errors to prevent operation with
voltage outside the guaranteed operating range.
Monitors whether the circuit monitoring the power
supply voltage and circuit used to perform
shutdown are functioning properly.
Diagnoses whether the reset has been performed
correctly.
Detects clock errors (frequency errors).
Diagnoses whether the CRC calculation circuit is
capable of correctly calculating CRC.
Verifies whether the Safety CPU and safety
function module are functioning normally without
running out of control.
Diagnostic timing
• When power is turned off and
on
• When the CPU module is reset
• When END processing is
performed
• When power is turned off and
on
• When the CPU module is reset
• When power is turned off and
on
• When the CPU module is reset
• When END processing is
performed
• When power is turned off and
on
• When the CPU module is reset
• When END processing is
performed
• When power is turned off and
on
• When the CPU module is reset
When executing safety cycle
processing
Always
• When power is turned off and
on
• When the CPU module is reset
• When END processing is
performed
Always
• When power is turned off and
on
• When the CPU module is reset
• When END processing is
performed
• When power is turned off and
on
• When the CPU module is reset
• When power is turned off and
on
• When the CPU module is reset
• When END processing is
performed
• When power is turned off and
on
• When the CPU module is reset
• When END processing is
performed
• When power is turned off and
on
• When the CPU module is reset
• When END processing is
performed
Error code
3C20H, 3C21H,
3C22H, 3C2FH,
3C33H
3C10H
3C15H
2180H, 36E1H,
3C33H, 3C34H
2180H, 3640H
3E60H
3E61H
3C00H, 3C01H

(Performs a
shutdown.)
3E10H, 3E11H
3E12H
3C16H
3E01H
3C11H, 3C17H