Siemens SIMATIC TIWAY 1 Manual de usuario descargar pdf (Pagina 98)

NIM Primitives

4-40

TIWAY 1 TI505 NIM User Manual

4.9.13.3 Write

and Gather Recor

d Primitive – Code 57

The

rite and Gather Record Primitive specifies which records (as defined with Define

Record

Primitive 55) will be read. It also allows you to replace any contiguous data ele

ment

locations. The Records are specified by record numbers from 1

to 20 (hex). The total

number

of bytes returned by the record(s) must not cause the response to exceed the

max

imum

frame length.

Following

the record numbers are the descriptors associated with the

write function. The

write

function is performed

before the gather operation. The response returns the data

associated

with the

requested records by starting with the lowest number record and in

creasing

to the highest record. A data record or data type separator is not provided in

the

response.

NOTE

exception will be returned if the write portion of this Primitive fails.

data will be returned for records in error or

invalid read definitions.

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Siemens SIMATIC TIWAY 1 Manual de usuario Pagina 98