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Modbus communication
A.3 Coil configuration
SITRANS F Ultrasonic flowmeters FST030 (Modbus)
Operating Instructions, 08/2017, A5E37367739-AC
127
A.3
Coil configuration
The device provides 20 coil definitions which can be configured.
Table A- 2
Coil configuration
Modbus
register
Data type /
Size in
bytes
Parameter
Description
Default value
[units]
1
(units register)
Value range /
Setting options
Access
level
10300
Unsigned / 2 Modbus coil
address 1
Specifies the coil address
with which the following bit
coded register value is ac-
cessible. The register and
bit(s) are specified by Mod-
bus coil register 1and Mod-
bus coil bitmask 1
1
0 - 65535
Read /
write
10301
Unsigned / 2 Modbus coil
register 1
Specifies the Modbus register
whose value is checked
against Modbus coil bitmask
1 to determine the coil value
(false or true). A register
value of 65535 specifies that
this coil mapping is unde-
fined.
Undefined
0 - 65535
Read /
write
10302
Unsigned / 4 Modbus coil
bitmask 1
Bit mask which is compared
against the register value
specified with Modbus coil
register 1 to determine the
coil value. If any bit of the
register value is set which is
also set in the bit mask then
the coil value is true, other-
wise the coil is false.
0
0 - 4294967295 Read /
write
10304
Unsigned / 2 Modbus coil
length 1
Output parameter that in-
forms about the size in bytes
of the parameter that is speci-
fied by Modbus coil address
1. Could be used to identify
the relevant bits of the Mod-
bus coil bitmask 1
-
Read only
10305
Unsigned / 2 Modbus coil
address 2
Specifies the coil address
with which the following bit
coded register value is ac-
cessible. The register and
bit(s) are specified by Mod-
bus coil register 2 and Mod-
bus coil bitmask 2
2
0 - 65535
Read /
write