Instruction Manual

Chapter 6
Programming Your Analog Module
6-3
This program is very similar to the PLC-3 program with the following
exceptions:
Use enable bits instead of done bits as the conditions on each rung.
Use separate control files for each block transfer instruction. Refer to
Appendix B.
Figure 6.2
PLC5
Family Sample Program Structure
EN
BTR
BLOCK XFER READ
RACK:
GROUP:
MODULE:
CONTROL:
1
0
0
N7:0
DN
DATA FILE:
LENGTH:
CONTINUOUS:
N10:0
5
N
ER
BTR Enable
15
1
EN
BTW
BLOCK XFER WRITE
RACK:
GROUP:
MODULE:
CONTROL:
1
0
0
N7:5
DN
DATA FILE:
LENGTH:
CONTINUOUS:
N10:10
27
N
ER
2
BTW Enable
15
N7:5N7:0
EN
BTW
BLOCK XFER WRITE
RACK:
GROUP:
MODULE:
CONTROL:
1
0
0
N7:10
DN
DATA FILE:
LENGTH:
CONTINUOUS:
N10:10
3
N
ER
BTR
15
15
3
BTW
Enable
Enable
N7:5N7:0
15
N10:0
BTR
15
15
BTW
Enable
Enable
PU
N7:5N7:0
15
N10:0
PU
At
powerup, the program enables a block
transfer read. Then, it initiates one block
transfer write to configure the module (rung 2).
Thereafter , the program continuously does
block reads and writes.
Program Action
PLC5 and PLC-5/250
Program Example