S7-400H 冗余CPU报错，冗余停止，OB35报警， CPU硬件诊断时
Event 1 of 59: Event ID 16# 39B2
I/O access error when transferring the process image to the output modules
P area, word access, access address: 8
process image partition no.: 0
not user relevant(Z1): 2943
Requested OB: Program execution error OB (OB85)
Priority class: 25
External error, Incoming event
12:36:56.993 AM 01/01/1994
(Coding: 16# 39B2 1955 2050 2943 0000 0008)


Event 2 of 59: Event ID 16# 39B2
I/O access error when transferring the process image to the output modules
P area, word access, access address: 56
process image partition no.: 0
not user relevant(Z1): 2943
Requested OB: Program execution error OB (OB85)
Priority class: 25
External error, Incoming event
12:36:56.993 AM 01/01/1994
(Coding: 16# 39B2 1955 2050 2943 0000 0038)


Event 3 of 59: Event ID 16# 39B2
I/O access error when transferring the process image to the output modules
P area, word access, access address: 54
process image partition no.: 0
not user relevant(Z1): 2943
Requested OB: Program execution error OB (OB85)
Priority class: 25
External error, Incoming event
12:36:56.992 AM 01/01/1994
(Coding: 16# 39B2 1955 2050 2943 0000 0036)


Event 4 of 59: Event ID 16# 39B2
I/O access error when transferring the process image to the output modules
P area, word access, access address: 52
process image partition no.: 0
not user relevant(Z1): 2943
Requested OB: Program execution error OB (OB85)
Priority class: 25
External error, Incoming event
12:36:56.992 AM 01/01/1994
(Coding: 16# 39B2 1955 2050 2943 0000 0034)


Event 5 of 59: Event ID 16# 39B2
I/O access error when transferring the process image to the output modules
P area, word access, access address: 50
process image partition no.: 0
not user relevant(Z1): 2943
Requested OB: Program execution error OB (OB85)
Priority class: 25
External error, Incoming event
12:36:56.992 AM 01/01/1994
(Coding: 16# 39B2 1955 2050 2943 0000 0032)


Event 6 of 59: Event ID 16# 39B2
I/O access error when transferring the process image to the output modules
P area, word access, access address: 6
process image partition no.: 0
not user relevant(Z1): 2943
Requested OB: Program execution error OB (OB85)
Priority class: 25
External error, Incoming event
12:36:56.992 AM 01/01/1994
(Coding: 16# 39B2 1955 2050 2943 0000 0006)


Event 7 of 59: Event ID 16# 39B2
I/O access error when transferring the process image to the output modules
P area, word access, access address: 4
process image partition no.: 0
not user relevant(Z1): 2943
Requested OB: Program execution error OB (OB85)
Priority class: 25
External error, Incoming event
12:36:56.992 AM 01/01/1994
(Coding: 16# 39B2 1955 2050 2943 0000 0004)


Event 8 of 59: Event ID 16# 39B2
I/O access error when transferring the process image to the output modules
P area, word access, access address: 2
process image partition no.: 0
not user relevant(Z1): 2943
Requested OB: Program execution error OB (OB85)
Priority class: 25
External error, Incoming event
12:36:56.992 AM 01/01/1994
(Coding: 16# 39B2 1955 2050 2943 0000 0002)


Event 9 of 59: Event ID 16# 39B2
I/O access error when transferring the process image to the output modules
P area, word access, access address: 0
process image partition no.: 0
not user relevant(Z1): 2943
Requested OB: Program execution error OB (OB85)
Priority class: 25
External error, Incoming event
12:36:56.992 AM 01/01/1994
(Coding: 16# 39B2 1955 2050 2943 0000 0000)


Event 10 of 59: Event ID 16# 2943
I/O access error, writing
P area, word access, Access address: 544
FC number: 74
Module address: 212
Requested OB: I/O access error OB (OB122)
Priority class: 1
External error, Incoming event
12:36:56.991 AM 01/01/1994
(Coding: 16# 2943 017A 8C20 0220 004A 00D4)


Event 11 of 59: Event ID 16# 2943
I/O access error, writing
P area, double-word access, Access address: 540
FC number: 74
Module address: 188
Requested OB: I/O access error OB (OB122)
Priority class: 1
External error, Incoming event
12:36:56.991 AM 01/01/1994
(Coding: 16# 2943 017A 8C30 021C 004A 00BC)


Event 12 of 59: Event ID 16# 2943
I/O access error, writing
P area, double-word access, Access address: 536
FC number: 74
Module address: 166
Requested OB: I/O access error OB (OB122)
Priority class: 1
External error, Incoming event
12:36:56.991 AM 01/01/1994
(Coding: 16# 2943 017A 8C30 0218 004A 00A6)


Event 13 of 59: Event ID 16# 2943
I/O access error, writing
P area, double-word access, Access address: 532
FC number: 74
Module address: 142
Requested OB: I/O access error OB (OB122)
Priority class: 1
External error, Incoming event
12:36:56.991 AM 01/01/1994
(Coding: 16# 2943 017A 8C30 0214 004A 008E)
请问下，这是什么原因引起的啊》？