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2 CompoWay/F Communications Procedures
E5@C Digital Temperature Controllers Communications Manual (H175)
2-2 Structure of Command Text
2
2-2-4 Addresses
The variable type is converted to 2-byte ASCII and loaded to the frame. The following table shows the
available variable types.
Note: Setup area 1 has no read-only parameters, so there is no variable type "C2."
An address is appended to each of the variable types. Express addresses in 2-byte hexadecimal and
append them for the specified access size. The address depends on the parameter. Refer to 3-1 Vari-
able Area (Setting Range) List for details.
The number of elements is expressed in 2-byte hexadecimal. The range that can be specified for the
number of elements depends on the command. Refer to 2-3 Detailed Description of the Services for
details.
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).
Variable type Description
C0/80 R/O (read only) parameter for setup area 0.
C1/81 R/W parameter for setup area 0.
C3/83 R/W parameter for setup area 1.
2-2-4 Addresses
2-2-5 Number of Elements
2-2-6 List of Services (Main Request Codes and Sub-Request Codes)
MRC SRC Name of service Processing
01 01 Read Variable Area This service reads from the variable
area.
01 02 Write Variable Area This service writes to the variable area.
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 operating status.
08 01 Echoback Test This service performs an echoback test.
30 05 Operation Command This service performs operations such
as RUN/STOP, executing/stopping AT
(auto-tuning), and moving to Setup Area
1.
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