2 Instruction Descriptions
2-706
NJ-series Instructions Reference Manual (W502)
CIPUCMMRead
The CIPUCMMRead instruction uses a UCMM explicit message to read the value of a variable in
another Controller on the specified CIP network.
* You cannot specify a STRING array.
Instruction Name
FB/
FUN
Graphic expression ST expression
CIPUCMM
Read
Read Variable
UCMM Explicit
FB CIPUCMMRead_instance(Execute,
RoutePath, TimeOut, SrcDat, Size,
DstDat, Done, Busy, Error, ErrorID,
ErrorIDEx, RcvSize);
Variables
Name Meaning I/O Description Valid range Unit Default
RoutePath Route path
Input
Route path Depends on data
type.
−--- ---
TimeOut Timeout time Timeout time 1 to 65535 0.1 s 20 (2 s)
SrcDat Source vari-
able name
Name of variable to read in
other Controller
Depends on data
type.
---
''
Size Number of
elements to
read
Number of elements to read 0 to 496 1
DstDat Read data In-out Read data value Depends on data
type.
--- ---
RcvSize Read data
size
Output Read data size 0 to 496 Bytes ---
Boolean
Bit strings Integers
Real
numbers
Times, durations,
dates, and text strings
BOOL
BYTE
WORD
DWORD
LWORD
USINT
UINT
UDINT
ULINT
SINT
INT
DINT
LINT
REAL
LREAL
TIME
DATE
TOD
DT
STRING
RoutePath OK OK
TimeOut OK
SrcDat OK
Size OK
DstDat
OK OK OK OK OK OK OK OK OK OK OK OK OK OK OK OK OK OK OK OK
An enumeration, array, structure, structure member, or union member can also be specified.*
RcvSize OK
CIPUCMMRead
CIPUCMMRead_instance
Execute Done
RoutePath Busy
TimeOut Error
SrcDat ErrorID
Size ErrorIDEx
DstDat
RcvSize
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