FC 100 - Digital Output Readback Check

This function code checks the operation of a digital output group. It compares the digital output values with those typically read back via a digital input group.

 

Outputs:

Blk

Type

Description

N

B

Status:

0 = all digital outputs match digital inputs

1 = one or more digital outputs do not match digital inputs

 

 

Specifications:

Spec

Tune

Default

Type

Range

Description

S1

N

0

I

Note 1

Block address of DO value 1

S2

N

0

I

Note 1

Block address of DI read back value 1

S3

N

0

I

Note 1

Block address of DO value 2

S4

N

0

I

Note 1

Block address of DI read back value 2

S5

N

0

I

Note 1

Block address of DO value 3

S6

N

0

I

Note 1

Block address of DI read back value 3

S7

N

0

I

Note 1

Block address of DO value 4

S8

N

0

I

Note 1

Block address of DI read back value 4

S9

N

0

I

Note 1

Block address of DO value 5

S10

N

0

I

Note 1

Block address of DI read back value 5

S11

N

0

I

Note 1

Block address of DO value 6

S12

N

0

I

Note 1

Block address of DI read back value 6

S13

N

0

I

Note 1

Block address of DO value 7

S14

N

0

I

Note 1

Block address of DI read back value 7

S15

N

0

I

Note 1

Block address of DO value 8

S16

N

0

I

Note 1

Block address of DI read back value 8

 

 

NOTES:

1. Maximum values are: 9,998 for the BRC-100, IMMFP11/12 and 31,998 for the HAC

 

 

 

100.1Explanation

 

Figure 100-1 illustrates the internal logic of function code 100. Function code 100 performs internal exclusive OR functions on eight digital output and digital input pairs. The exclusive ORs require that both inputs be the same for the output to equal logic 0. If the inputs to the exclusive OR are not the same, the output equals logic 1.