Siemens SIMATIC TIWAY 1 User Manual page 94

SIMATIC TIWAY I Series 500 NIM User Manual
Symbol Value
CC
TT
NNNN
AAAA
Response: LLLL 50 HH
Symbol Value
HH
Gather Block Primitive – Code 51. The Gather Block Primitive specifies
which blocks (as defined by the Define Block Primitive 50) will be read. The
blocks are specified through a 32-bit mask (EEEEEEEE).
Each bit position in the bit mask corresponds to a block that was defined
with Primitive 50, Define Block. A bit set to 1 indicates that the block is to
be returned. A bit set to 0 means that the block will not be returned. You
should not request more data than can be returned in a maximum length
Primitive frame. The response will return the data associated with the
requested blocks, beginning with the lowest block number and increasing to
the highest block number. A data block separator is not provided in the
response.
Request: LLLL 51 EEEEEEEE
where EEEEEEEE is 32 bits, defined as:
Response: LLLL 51 HH EEEEEEEE DD ... DD
Definition
Block number (1–20 hex)
Data element type
Number of locations
Data element location
Definition
Attached device operational status
(repeated)
NIM Primitives 4-41