Setup guide

Chapter 3 Driver and Protocol Objects
Object Reference Manual 3-26 www.Automationdirect.com
Request and Response Format Strings
The request and response format strings consist of static characters and
markers that control how the request and response frames respectively are
formatted or decoded. The request format string is used to
create
the
request frame, which is sent to the device, while the response format string
is used to decode the response frame, which comes from the device.
Static characters in the format strings are reproduced exactly in the request
or response frame. Markers specify the location within the frame and type
RQSum:1:1 -
RQSum255:255
numeric yes no Request byte sum
RQV1, RQV512 numeric no yes Variable list used to populate request
frame with numeric values.
RQV1.logical,
RQV512.logical
logical no yes Variable list used to populate request
frame with logical values.
RQV1.txt, RQV512.txt text no yes Variable list used to populate request
frame with text values.
RSFilter text no yes All characters in this string will be
filtered out of the incoming response
before processing.
RSSum1:1 -
RSSum255:255
numeric yes no Response byte sum
RSV1, RSV512 numeric yes no Variable list used to store values
retrieved from response frame.
RSV1.logical,
RSV512.logical
logical yes no Variable list used to store values
retrieved from response frame.
RSV1.txt, RSV512.txt text yes no Variable list used to store values
retrieved from response frame.
Send logical no yes Sends request frame.
Update logical yes no Object-generated signal that pulses
low each time it polls the device.
RSVn, RSVn.txt and RSVn.logical all represent the same value in different forms
RQVn, RQVn.txt and RQVn.logical all represent the same value in different forms
Table 3-5. ASCII Data Members (Continued)
Data Member Type Read Write Description