Rockwell Automation 1771-VHSC , D17716.5.74 Very High S - Manual (Page 57)

Sample Programs B–4
Addditional Sample Program for PLC-5 Family Processors
EN
BTR
BLOCK XFER READ
RACK:
GROUP:
MODULE:
CONTROL:
0
0
0
N21:0
DN
DATA FILE:
LENGTH:
CONTINUOUS:
N22:101
0
N
ER
EN
BTW
BLOCK XFER WRITE
RACK:
GROUP:
MODULE:
CONTROL:
0
0
0
N21:5
DN
DATA FILE:
LENGTH:
CONTINUOUS:
N22:1
0
N
ER
N21:0
15
N22:101
0
N21:5
15
This block transfer read rung can be used alone or with the block transfer write rung shown below. If used alone, all VHSC counters will operate
in a default mode of outputs disabled, rollover at 999,999 and count mode with pulses counted on channel A, direction sensed at channel B and
the gate is not active.
If the default module operation is acceptable, this rung can be optional. If it is necessary to reconfigure, this rung will automatically send a new
configuration to the module (using the module configured bit N22:101/0 in the BTR file). This will occur on power up and each time the processor
is changed from program to run mode. The optional user bit I:001/07 can also configure the module at any time. Not enabling the BTW can increase
throughput of the read.
VHSC BTR
Enable Bit
VHSC BTR
Control Block
VHSC Module
Configured Bit
VHSC BTW
Enable Bit
VHSC BTW
Control Block
I:001
07
Optional User
Bit
Rung 2:0
Rung 2:1
Rung 2:2
[End of file]