User Manual Owner's manual

Publication 1746-UM022B-EN-P - January 2005

Programming Examples 5-13

PLC 5 Example with NT8 in

Remote I/O Rack

The following example shows sample ladder logic when using a

PLC/5 controller to control the module in remote rack across the

Remote I/O network. The PLC/5 must use Block transfer reads and

writes to communicate with the 1746-NT8 module in a remote rack.

Note, the example provides code which will reconfigure the module if

the PLC/5 senses are remote rack fault. Also, the PLC/5 processor uses

the exact same configuration words as the SLC 500 processors.

TON

Timer On Delay

Timer T11:2

Time Base 1.0

Preset 7<

Accum 0<

TON

NT8_REG_CNF_TMR

T11:2

NT8_REG_CNF_TMR/DN

B3:6

NT8_CHECKING_STS

END

0008

0009

After the NT8 has restored its normal I/O image, clear the NT8 checking status bit (B3/100).