请教大家关于FM458报错的问题，我FM458后边挂的是FM438，设备用了一年没出过问题，最近458运行报警，断电重新上电以后就恢复了，但是运行一段时间后又报警，错误代码如下请大家帮忙分析谢谢。


Event 35 of 100:  Event ID 16# 4550
DEFECTIVE: internal system error
No relevance for user (Z1): 0711
Previous operating mode: RUN
Requested operating mode: DEFECTIVE
Internal error, Incoming event
11:49:23.000 PM  01/02/1994
(Coding: 16# 4550  FF8D  0050  0711  0000  0000)




Cause:
The internal CPU firmware has detected an inconsistent status that can also result from a firmware error on the CPU.

Effect:
This status is indicated by all the CPU LEDs flashing. In this status, the program is no longer executed and no further operations are possible. Outputs are deactivated.

To correct or avoid errors:
Normally the CPU is operational again after turning it off and on again, or with more serious errors after turning it off and on again without battery backup (in either case the CPU must first be switched to STOP). The detailed information of the diagnostic buffer entry contains a hexadecimal code with the comment "No relevance for user". Note down this code and contact the manufacturer.

Make sure that there is not simply a mechanical problem by removing and reinserting the CPU.
The CPU is defective if the error occurs again after power on without battery backup.
In an M7 system:
The event can also be indicated on a function module (FM).