Rockwell-automation 1771-DB BASIC MODULE Bedienungsanleitung PDF herunterladen (Seite 319)

Chapter

Call Routines 69–127

13 -61

Input Argument One

The first input argument is the type of PLC READ command you issued:

0 = disable the previously executed CALL 122

2 = common interface file – PLC-2 unprotected READ command

3 = PLC-3 file – word range READ command

5 = PLC-5 file – typed READ command

Input Argument Two

The second input argument is the node address of the remote PLC device

(0 through 255). 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 to be read on the PLC 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

the common interface file is chosen in the first parameter, but you must

still PUSH it.

Input Argument Four

The fourth input argument is the file type to be read from the PLC remote

device. Enter the file type code as shown below. This argument is ignored

if you chose the common interface file in the first parameter but you must

still PUSH it (assumes integer type). If the file type is not one of these, the

status equals 2 and the read message does not take place.

File type File type code Words/Element

(1 word = 16 bits)

integer file ASC(N) 1 word/element

status file ASC(S) 1 word/element

counter file ASC(C) 3 words/element

timer file ASC(T) 3 words/element

bit file ASC(B) 1 word/element

control file ASC(R) 3 words/element

input file ASC(I) 1 word/element

output file ASC(O) 1 word/element

Input Argument Five

The fifth input argument is the starting word offset within the file on the

PLC-2 remote device (0 through 32766). For PLC-3 integer, binary, or

status files, the value is 0–9999. For PLC-3 I/O files, the value is 0–4095.

For PLC-3 timer or counter files the value must be 0. If the number is not

within this range, the status equals 2 and the transfer does not occur.

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Rockwell-automation 1771-DB BASIC MODULE Bedienungsanleitung Seite 319