1771-AL A-B Filter Modules
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Subprogram Calls Use a subroutine to store recurring sections of program logic that can be accessed from multiple program files. A subroutine saves memory because you program repetitive logic only once. The JSR instruction directs the processor to go to a separate subroutine file within the logic processor, scan that subroutine file once, and return to the point of departure. For detailed information about how you generate and use subroutines, see your programming software documentation set.
Sequential Function Charts Use SFCs as a sequence-control language to control and display the state of a control process. Instead of one long ladder program for your application, divide the logic into steps and transitions. A step corresponds to a control task; a transition corresponds to a condition that must occur before the programmable controller can perform the next control task. The display of these steps and transitions lets you see what state the machine process is in at a given time. For detailed information about how you generate and use SFCs, see you programming software.
In a PLC-5 backup system configuration, one system controls the operation of remote I/O and DH+ communications. This system is referred to as the “primary system.” The other system is ready to take control of the remote I/O and DH+ communications in the event of a fault in the primary system. This is referred to as the “secondary system.” See chapter 2, “Choosing Hardware,” to select backup system hardware. See the PLC-5 Backup Communication Module User Manual, publication 1785-6.5.4, for more information on configuring a PLC-5 backup system.
The structure and details of the product：
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AB 1756-LSP
AB 1756-LSP/B
AB 1756-M02AE
AB 1756-M02AS
AB 1756-M03SE
AB 1756-M08SE
AB 1756-M1
AB 1756-M16S
AB 1756-M16SE
AB 1756-N2
AB 1756-OA16
AB 1756-OA16I
AB 1756-OB16D
AB 1756-OB16E
AB 1756-OB16I
AB 1756-OB16I/A
AB 1756-OB16IEF
AB 1756-OB16IS
AB 1756-OB32
AB 1756-OB32/A
AB 1756-OB8
AB 1756-OF4
AB 1756-OF41794-ADN
AB 1756-OF6CI
AB 1756-OF6VI
AB 1756-OF8
AB 1756-OF8/A
AB 1756-OF81
AB 1756-OG16
AB 1756-OH8I
AB 1756-ON8
AB 1756-OV16E
AB 1756-OV32E
AB 1756-OW16I
AB 1756-OW16I/A
AB 1756-OX8I
AB 1756-PA72
AB 1756-PA72/B
AB 1756-PA72/C
AB 1756-PA75
AB 1756-PA75/A
AB 1756-PA75/B
AB 1756-PA75R
AB 1756-PAR2
AB 1756-PB72
AB 1756-PB75
AB 1756-PB75R
AB 1756-PBR2
AB 1756-PC75
AB 1756-PLS
AB 1756-PSCA2/A
AB 1756-RM
AB 1756-RM2
AB 1756-RM2/A
AB 1756SC-CTR8
AB 1756-SRM/B
AB 1756-TBCH
AB 1756-TBNH
AB 1756-TBS6H
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