• If any of the time element has not been updated, the time synch warning is turned
on and the time synch status in WHMI indicates “Bad”.
• If the value written in a time element is out of the acceptable value range for the
corresponding time element, the particular time element’s value is not updated
and an exception code 4 is sent to the Modbus client.
• If the Modbus master/client disconnects from RIO600, a time sync warning is
raised again in LECM and the time sync status in WHMI indicates “Bad”.
• If Modbus time sync command has not been received from the Modbus master/
client for a minimum time period of half an hour, a time sync warning is raised
again in LECM and the time sync status in WHMI indicates “Bad”.
Table 121: Time synchronization in RIO600
Modbus
address
(in decimal)
Attribute name
Information Scale factor Data type More
information
(Valid range)
8
Time synchronisation Year 1 Unsigned 16 2000...9999
9 Time synchronisation Month 1 Unsigned 16 1...12
10 Time synchronisation Day 1 Unsigned 16 1...31
11 Time synchronisation Hour 1 Unsigned 16 0...23
12 Time synchronisation Minute 1 Unsigned 16 0...59
13 Time synchronisation Seconds 1 Unsigned 16 0...59
7.1.26 Parameter settings
Modbus communication needs to be enabled via the PCM600 path Configuration/
Station communication/MODBUS. The station communication parameters need to
be set to use Modbus communication in RIO600.
Table 122: Station communication parameters for Modbus
Parameter name
Range Unit Default value Description
Modbus operation ON/OFF - Off Select “ON” to enable Modbus
communication with client.
Modbus connection
timeout
1...100 Sec 10 If there is no request from other client
within this timeout, RIO600 closes
the TCP connection.
TCP Client Modbus
operation
ON/OFF - Off Select “ON” to enable Modbus
communication with the client.
Slave ID 1...254 - - Slave ID of RIO600
Client IP - - 000.000.000
.000
IP address of the Modbus client
Binary input read
method
Latched - Latched Binary input signal information is
stored until a Modbus request
command is received.
-
Instantaneo
us
- - The current binary signal information
would be provided to the client upon
request.
Table continues on next page
1MRS757488 H Section 7
Modbus TCP communication
RIO600 179
Installation and Commissioning Manual
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