PLC-5 Address Formats

PLC-5 devices support the following address formats:

File Type

Address Format

D. A. N, F, B

<FILE><FILE NUMBER>:<ELEMENT>

 

The use of leading zeros when specifying the <FILE NUMBER> and <ELEMENT> is not supported.

S, I, O

<FILE>:<OFFSET>

 

where <FILE> is I for inputs, O for outputs, and S for status.

T, C, R

<FILE><FILE NUMBER>:<ELEMENT>.<TYPE>

 

where <TYPE> is one of the following:

ACC - Accumulator

PRE - Preset

CTL - Control Word

LEN - Length (R only)

POS - Position (R only)

Accumulators, Presets, and Control Words are 16 bits.

 

Bit offsets for the Control Word (CTL) in Controls are:

 

Control Bit

Offset

Control Bit

Offset

 

EN

15

ER

11

 

EU

14

UL

10

 

DN

13

IN

9

 

EM

12

FD

8

 

Bit offsets for the Control Word (CTL) in Counters and Timers are:

 

Counters

Timers

 

Control Bit

Offset

Control Bit

Offset

 

CU

15

EN

15

 

CD

14

TT

14

 

DN

13

DN

13

 

OV

12

 

 

 

UN

11

 

 

PD

<FILE NUMBER>:<ELEMENT>

 

For more information about using this file type, see PLC-5 PD File Support.

More information

Point address formats.