Rockwell Automation 900 Temperature Controller Communications Functions - Series B - Manual (Page 23)

Publication 900-UM004D-EN-E - July 2010
Bulletin 900 Communications Procedures 900-TCx (CompoWay/F) 2-7
Number of Elements
The number of elements is expressed in 2-byte hexadecimal code. The range
that can be specified for the number of elements depends on the command.
Refer to Detailed Description of Services on page 2-8.
List of Services
Note: No commands will be accepted and no responses will be returned when
a memory error (RAM error) has occurred or the controller is initializing (until
the controller recognizes the process value after the power is turned ON).
Table 2.6
MRC SRC Name of Service Process
01 01 Read from variable
area This service reads from variable areas.
01 02 Write to variable area This service writes to variable areas.
01 04 Composite Read from
Variable Area This service reads from the variable area in
the order specified by the parameters.
01 13 Composite Write to
Variable Area This service writes to the variable area in the
order specified by the parameters.
05 03 Read Controller
Attributes This service reads the model number and
communications buffer size.
06 01 Read controller status This service reads the run status of the
controller.
08 01 Echoback test This service carries out the echoback test.
30 05 Operation instructions This service carries out run/stop,
communications writing, write mode, save
RAM data, AT (auto-tuning) execution/cancel,
multi-SP, move to protect function, move to
setup area 1 and software reset.