Allen-Bradley 1746-BAS, User Manual, Page: 64 / 84

Publication 1746-UM004A-US-P
4-18 Programming Overview
Figure 4.6 Data Flow Between the Module and SLC Processor
In addition, the commands in the following table provide status of and control over
the data transfer between the SLC processor and module.
For more information regarding the use of these commands, refer to the BASIC
Language Reference Manual (publication number 1747-RM001A-US-P).
The following table lists module buffer addresses. Refer to page 4-1 for more
information regarding module buffer addresses.
SLC Processor
CALL 53
16 bytes
SLC OUTPUT
IMAGE
BASIC INPUT
BUFFER
BASIC
OUTPUT
BUFFER
CALL 14/15
CALL 14/15
CALL 56
CALL 54
CALL 57
16 bytes
128 bytes
128 bytes
SLC INPUT IMAGE
SLC M0
SLC M1
1746-BAS or 1746-BAS-T Module
Table 4.15 Status and Control Commands
Command Purpose
CALL 51 Checks if the CPU output image buffer was updated.
CALL 55 Checks if the CPU input image buffer was read by the processor.
CALL 58 Checks if the CPU M0 file was updated.
CALL 59 Checks if the CPU M1 file was read by the processor.
CALL 86 Checks if the DH485 interface file was updated.
CALL 87 Checks if the DH485 interface file was read by an external device.
CALL 120 Clears the module input and output buffers.
Table 4.16 BASIC Input/Output Buffer Address Map
Address BASIC Input/Output Buffer Address
M1:e.s 100 through 163
M0:e.s 100 through 163
I:e.s 200 through 207
O:e.s 200 through 207
CIF in 0 through 39
CIF out 0 through 39