Rockwell Automation 1771-DB BASIC MODULE - Manual (Page 236)

Chapter
Call Routines 0–68 12
12 -46
This call is active until you re-execute it with different input parameters.
Input and Output Arguments
This call has ten input arguments and one output argument.
Argument Description Page
input 1 type of DH-485 READ 12 -46
input 2 node address of the DH-485 remote device (0 through 31) 12 -46
input 3 file number on the DH-485 remote device (0 through 255) 12 -46
input 4 file type to be read from the remote device 12 -47
input 5 starting word offset within the file on the remote device (0
through 32766) 12 -47
input 6 number of words to be transferred 12 -47
input 7 the message time-out value 12 -47
input 8 the selection of the destination file and/or string 12 -48
input 9 always 1 12 -48
input 10 the string number 12 -48
output 1 call status 12 -48
To disable this call, you must PUSH a 0 into the first input parameter.
All other parameters are ignored, but you must still PUSH them.
Input Argument One
The first input argument is the type of DH-485 READ command issued:
0 = disable the previously executed CALL 49
1 = common interface file (CIF) read
2 = SLC typed read
Input Argument Two
The second input argument is the node address of the DH-485 remote
device (0 through 31). If the number is not within this range, the status
equals 2 and the read message does not occur.
Input Argument Three
The third input argument is the file number on the DH-485 remote device
(0 through 255). If the number is not within this range, the status equals 2
and the read message does not occur. The parameter is ignored if you
choose the Common Interface File (CIF) in the first parameter. The CIF is
always file 9.