Rio communication retry counter (m1:e.16 - 47) -30, Retry counter example for primary devices – Rockwell Automation 1747-BSN Backup Scanner Module User Manual
Page 92
Publication 1747-UM010B-EN-P - September 2003
5-30 Configuration and Programming
RIO Communication Retry Counter (M1:e.16 - 47)
M1 File Status Words 16 through 47 indicate how many RIO
communication retries the scanner makes to each adapter on the RIO
link if communication problems occur. Each word (16 to 47) contains
a retry counter for each configured quarter logical rack (words 16 to
31 are for primary logical racks, 0 to 3, and 32 to 47 are for
complementary racks, 8 to 11). Retry counters are useful for
troubleshooting communication problems (such as electrical noise or
poor communication line connections) between the scanner and any
adapters. The scanner clears the retry counters when going from
Program to Run mode, Test to Run mode, and Program to Test mode.
Note that the display (in words M1:e.16 to 31) of retry counters
corresponds to the bits set in the Primary Logical Device Address -
Word 1 of the G file. Likewise, the display (in words M1:e.32 to 47)
correspond to the bits set in the Complementary Logical Device
Address – Word 3 of the G file.
Retry Counter Example for Primary Devices
The scanner’s I/O image tables are configured as shown with M1
status files displaying the corresponding retry counters:
IMPORTANT
Your SLC control program cannot initialize/clear retry
counters.
0
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
1
0
1
1
0
0
0
0
1
0
0
1
0
0
1
6 4 2 0
6 4 2 0
6 4 2 0
6 4 2 0
0
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
1
0
0
1
0
0
0
1
0
0
0
1
1
0
0
6 4 2 0
6 4 2 0
6 4 2 0
6 4 2 0
G File Primary
G File Complementary
Specifies RIO
addresses for
primary logical
devices
Specifies RIO
addresses for
complementary
devices.
Primary Logical Device Address, Word 1
Complementary Logical Device Address,
Word 3
RIO Logical Rack 3
Starting Group
RIO Logical Rack 2
Starting Group
RIO Logical Rack 1
Starting Group
RIO Logical Rack 0
Starting Group
RIO Logical Rack 11
Starting Group
RIO Logical Rack 10
Starting Group
RIO Logical Rack 9
Starting Group
RIO Logical Rack 8
Starting Group
Bit Number
Bit Number