8 Communication
8.2 Modbus
147
SICAM I/O Unit, 7XV5673, Device Manual
E50417-H1040-C484-A3, Edition 05.2012
Use as Write Register
This data format enables up to 8 commands to be transmitted via the holding register for which the ON/OFF
bits are set to either 0/1 or to 1/0. If these bits are set to 0/0 or 1/1, no evaluation will be performed.
8.2.8
Data in the Modbus Registers (Data Mapping)
The indications, values etc.are stored in holding registers. The existing register groups are described in the fol-
lowing chapters:
•
Register 0001 to 0049: Device identification, for example device type and name, serial number (read only)
•
Register 0050: Information on device configuration (read only)
•
Register 0051: Information on inputs/outputs, for example number of binary inputs/outputs (read only)
•
Register 0065 to 0068: Date and time (reading and writing)
•
Register 0071 to 0089: Version information, for example boot firmware (read only)
•
Register 0101: Indications regarding device status, for example battery fault (read only)
•
Register 0131: Indications regarding status of relay outputs (read only)
•
Register 0131: Indications regarding status of relay outputs (read only)
•
Register 0141: Controllable messages
Indication from Remote
(read and write)
8.2.8.1
Register 0001 to 0049: Device Identification
These registers are write protected. A write attempt will be rejected with exception code 03
(ILLEGAL_DATA_VALUE).
ON
Holding register 0141
OFF
In d ica tio n 8
ON OFF
In d ica tio n 7
ON OFF
In d ica tio n 1
ON OFF
In d ica tio n 2
ON OFF
In d ica tio n 3
ON OFF
In d ica tio n 4
ON OFF
In d ica tio n 5
ON OFF
In d ica tio n 6
NOTE
The data for Modbus TCP and Modbus UDP (Ethernet) and Modbus RTU (serial) in the Modbus registers are
the same.
Register
Type of information
Remark
0001 to 0008
Device type
(string, max. 16 characters)
“IO_UNIT“
0009 to 0024
Device ordering code
(string, max. 32 characters)
Example:
“7XV56730JJ101AA1”
0025 to 0040
Device name from the configuration
(string, max. 32 characters)
Example:
“IO_UNIT #1”
0041 to 0049
Device serial number
(string, max. 16 characters)
Example:
“BF0904075879”
MAN_SICAM_IO-Unit_7XV5673_US.book Page 147 Thursday, May 10, 2012 10:59 AM
