近期遇到一个问题，PLC出现了死机的问题；

Event 7 of 54:  Event ID 16# 4548

STOP due to I/O management 

Previous mode: RUN 

Requested mode: STOP (internal)

Internal error, Incoming event

06:35:01.908 AM  01/01/1994

(Coding: 16# 4548  FF84  C000  0000  8005  0000)

Event 8 of 54:  Event ID 16# 2942

I/O access error, reading

P area, word access, Access address:    246

Requested OB: I/O access error OB (OB122)

Priority class:  1

External error, Incoming event

06:35:01.908 AM  01/01/1994

(Coding: 16# 2942  017A  0020  00F6  0000  0000)

Event 9 of 54:  Event ID 16# 2942

I/O access error, reading

P area, word access, Access address:    244

Requested OB: I/O access error OB (OB122)

Priority class:  1

External error, Incoming event

06:35:01.908 AM  01/01/1994

(Coding: 16# 2942  017A  0020  00F4  0000  0000)

Event 10 of 54:  Event ID 16# 2942

I/O access error, reading

P area, word access, Access address:    242

Requested OB: I/O access error OB (OB122)

Priority class:  1

External error, Incoming event

06:35:01.908 AM  01/01/1994

(Coding: 16# 2942  017A  0020  00F2  0000  0000)

Event 29 of 54:  Event ID 16# 2942

I/O access error, reading

P area, word access, Access address:    204

Requested OB: I/O access error OB (OB122)

Priority class:  1

External error, Incoming event

06:35:01.906 AM  01/01/1994

(Coding: 16# 2942  017A  0020  00CC  0000  0000)

、、、、、、、、、、连续的24个模拟量输入；

Event 30 of 54:  Event ID 16# 2942

I/O access error, reading

P area, word access, Access address:    202

Requested OB: I/O access error OB (OB122)

Priority class:  1

External error, Incoming event

06:35:01.906 AM  01/01/1994

(Coding: 16# 2942  017A  0020  00CA  0000  0000)

Event 31 of 54:  Event ID 16# 2942

I/O access error, reading

P area, word access, Access address:    200

Requested OB: I/O access error OB (OB122)

Priority class:  1

External error, Incoming event

06:35:01.905 AM  01/01/1994

(Coding: 16# 2942  017A  0020  00C8  0000  0000)

程序中已调用了OB122;

模拟量的读取采用的是间接寻址方式；本人增加直接访问的一段程序，L PIW200-----L PIW246 ;一直周期内不能两次访问同一个通道吗？