Rockwell Automation 1794-IJ2XT FLEX I/O Frequency Input Modules User Manual - Manual (Page 78)

Publication 1794-6.5.11 - September 2011
68 Program Your Module with PLC Processors
PLC-5/250 Family Processor
Block transfer instructions with the PLC-5/250 processor use a control file
and a data file. The block transfer control file contains the data table section
for module location, the address of the block transfer data file and other
related data. The block transfer data file stores data that you want transferred
to the module (when programming a BTW) or from the module (when
programming a BTR).
The programming terminal automatically selects the control file based on rack,
group and module, and whether it is a read or write. A different block transfer
control file is used for the read and write instructions for your module. A
different block transfer control file is required for every module.
EN
BTR
BLOCK TRANSFER READ
Rack
Group
Slot
Control
01
2
0
N22:200
DN
Data File
Length
Continuous
N22:101
0
N
ER
EN BLOCK TRANSFER WRITE
Rack
Group
Slot
Control
01
2
0
N22:205
DN
Data File
Length
Continuous N22:1
0
N
ER
N22:200
15
N22:200
15
N22:205
15
Rung 2:0
The IJ2 module is located in rack 1, I/O group 2, slot 0. The integer control file
starts at N22:200, is 5 words long and is compatible with all PLC-5 family members.
The data obtained by the PLC-5 processor from the IJ2 module is placed in memory
starting at N22:101, and with the default length of 0, is 7 words long. The length
can be any number between 0 and 7. In enhanced PLC-5 processors, the block transfer
data type may be used as a control file.
N22:205
15
Rung 2:1
The IJ2 module is located in rack 1, group 2, slot 0. The integer control file
starts at N22:205, is a 5 words long and is compatible will all PLC-5 family
members. The data sent by the PLC-5 processor to the IJ2 module starts at N22:1,
and with the default length of 0, is 8 words long. Valid BTW lengths can be any
number from 0 to 8. In enhanced PLC-5 processors, the block transfer data type
may be used as a control file.
IJ2 BTR
Enable Bit
IJ2 BTW
Enable Bit
IJ2 BTR
Control File
IJ2 BTR
Enable Bit
IJ2 BTW
Enable Bit
IJ2 BTW
Control File
PLC-5 Processor
Program Example
BTW
Enhanced PLC-5 processors include: PLC-5/11, -5/20, -5/3x, -5/4x, and -5/6x. 1
1
1
45564