Parameter
Values (Range)
Unit
Step
Default
Description
1=On
MMS
0=Off
1=On
1=On
MMS communica-
tion mode
3.1.17
MODBUS Settings
Table 23: Non group settings
Parameter
Values (Range)
Unit
Step
Default
Description
Operation
1=on
5=off
5=off
Enable or disable
this protocol in-
stance
Port
1=COM 1
2=COM 2
3=Ethernet - TCP 1
3=Ethernet - TCP 1
Port selection for
this protocol in-
stance. Select be-
tween serial and
Ethernet based
communication.
Mapping selection
1...2
1
1
Chooses which
mapping scheme
will be used for this
protocol instance.
Address
1...254
1
1
Unit address
Link mode
1=RTU
2=ASCII
1=RTU
Selects between
ASCII and RTU
mode. For TCP, this
should always be
RTU.
TCP port
1...65535
1
502
Defines the listen-
ing port for the
Modbus TCP server.
Default = 502.
Parity
0=none
1=odd
2=even
2=even
Parity for the serial
connection.
Start delay
0...20
1
4
Start delay in char-
acter times for seri-
al connection
End delay
0...20
1
4
End delay in charac-
ter times for serial
connections
CRC order
0=Hi-Lo
1=Lo-Hi
0=Hi-Lo
Selects between
normal or swap-
ped byte order for
checksum for seri-
al connection. De-
fault: Hi-Lo.
Client IP
0.0.0.0
Sets the IP address
of the client. If set
to zero, connection
from any client is
accepted.
Write authority
0=Read only
1=Disable 0x write
2=Full access
2=Full access
Selects the control
authority scheme
Time format
0=UTC
1=Local
1=Local
Selects between
UTC and local time
for events and
timestamps.
Table continues on the next page
Basic functions
1MRS759142 F
68
REX640
Technical Manual