Allen-Bradley 1747-ASB User Manual

Publication 1747-UM006B-EN-P - June 2003
Application Examples 8-19
1747-ASB Module 1 Configuration Details
Because the image of the 1747-ASB module 1 crosses logical rack
boundary 1 and 2, 1747-ASB module 1 appears as two logical devices
to the RIO scanner.
1747-ASB module 1 is configured for last chassis because it has the
highest numbered logical group (group 5) in its highest numbered
logical rack (logical rack 2).
1747-ASB module 1 is configured for hold last state and processor
restart lockout. If the RIO communications cable is removed and
reconnected during normal RIO communications, the discrete outputs
remain in their last state and the 1747-ASB module does not resume
communicating with the scanner until the processor restart lockout
terminals are momentarily shorted together. For more information
regarding processor restart lockout, refer to chapter 4.
1747-ASB module 1 is configured as a complementary chassis.
Because complementary I/O is not being used, there is no need for a
primary chassis.
The 1747-ASB module 1 response time is unrestricted because the
PLC-5/40 does not require a restricted response time.
Bit Number Octal
Logical
Rack 1
071017
Logical
Rack 2
PLC Processor Input Image
Group 0
Group 1
Group 2
Group 3
Group 4
Group 5
Group 6
Group 7
Group 0
Group 1
Group 2
Group 3
Group 4
Group 5
Group 6
Group 7
1747-ASB
Module 1
NIO4V
IA16IA16
IG16 IG16
Bit Number Octal
Logical
Rack 1
071017
Logical
Rack 2
PLC Processor Output Image
Group 0
Group 1
Group 2
Group 3
Group 4
Group 5
Group 6
Group 7
Group 0
Group 1
Group 2
Group 3
Group 4
Group 5
Group 6
Group 7
Not Used
Not Used
Not Used
Not Used
Not Used
Not Used
IB16 IB16
NO4V
IA16IA16
IV16IV16
Not Used
Not Used
1747-ASB
Module 1
NIO4V
OW16OW16
OG16 OG16
Not Used
Not Used
Not Used
Not Used
Not Used
Not Used
OB16 OB16
NO4V
OW16OW16
OV16OV16
Not Used
Not Used
OW8
OV8 OW8
OA8
I:010
I:01 1
I:012
I:013
I:014
I:015
I:016
I:017
I:020
I:021
I:022
I:023
I:024
I:025
I:026
I:027
O:010
O:01 1
O:012
O:013
O:014
O:015
O:016
O:017
O:020
O:021
O:022
O:023
O:024
O:025
O:026
O:027
IMPORTANT
Selecting processor restart lockout disables PLC auto
configurations on the 1747-ASB module except for
initial powerup. If processor restart lockout is not
selected, you are able to perform PLC auto
configurations on the 1747-ASB module.
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Allen-Bradley 1747-ASB Specifications

General

Brand	Allen-Bradley
Model	1747-ASB
Category	Control Unit
Language	English