Supported Modbus Commands; Setup Parameters - GSE 60 SERIES Technical Reference Manual

8-26 Chapter 8
GSE Scale Systems
The transfer of numeric and alpha data via Modbus is based upon each
data item having a register address within the slave. The master then
specifies the address of the data item to sent to or received from the slave
and the slave accepts the received data or sends the specified data in a
format that is intended to be independent of data type.
Modbus should not be confused with Modbus Plus which is a proprietary
protocol owned by Modicon, Inc.
S M
UPPORTED ODBUS
Following are brief descriptions of the Modbus commands supported by 60
Series instruments. They are listed with the Modbus function code
followed by the function name.
R C S
EAD OIL TATUS
Since the 60 Series instruments do not use separate numbering for input
and output setpoints (coils) both of these commands will read the status of
the specified setpoint number, regardless of type.
R H R
EAD OLDING EGISTERS
This command contains addresses offset from address 40001. A
programmable translation table in the 60 Series instrument is used to
translate register addresses to parameter numbers and instances. Each
row of the translation table contains three elements:
Parameter Number
Instance
Translation Type
F M C
ORCE ULTIPLE
Allows a several sequential setpoint output states to be specified.
P M
RESET ULTIPLE
Allows multiple parameters within the indicator to be given new data.
S P
ETUP ARAMETERS
E M
NABLING ODBUS
P205 "RecvX" now has another choice, "Modbs". This selection specifies
that all communications (both transmit and receive) on the current serial
port are Modbus format.
While Modbus is specified for a given COMM port, then that port cannot be
used to send data native 60 Series commands to the indicator. Also, any
attempt to send data out a Modbus Comm port (using the will result in the
"NoTxX Allow" message being displayed briefly.
C
OMMANDS
/R I S
EAD NPUT TATUS
OILS
R
EGISTERS