11.12
Modbus Communication Specification
Table 11-19 Modbus communication specification
Description
Specification
Device type
Slave
Baud rates
• 9600
• 19 200 (Factory setting FCT010)
• 38 400
• 57 600
• 76 800
• 115 200 (Factory setting DSL/FCT070)
Number of stations
Max. 31 per segment without repeaters
Device address range
1 to 247
Protocol
Modbus RTU
Electrical interface
RS-485, 2-wire
Connector type
M12 or cable termination
Supported function codes
• 3: read holding registers
• 16: write multiple registers
• 8: diagnostics
Broadcast
No
1)
Maximum cable length [m]
600 meters (@ 115 200 bits/sec)
Standard
Modbus over serial line v 1.0
2)
Certification
one
Device Profile
None
1)
: Standard restriction. The standard requires a LED indicator for visual diagnosis. This device
does not support a LED indicator. This device does not react to any Broadcast commands.
2)
: According to the Specification & Implementation guide v. 1.0 available at the Modbus
Organization website
Note
Storage location
All Modbus settings of the device are stored in a non-volatile memory.
11.13
PED
The pressure equipment directive 2014/68/EU applies to the alignment of the statutory orders
of the European member states for pressure equipment. Such equipment in the sense of the
directive includes vessels, pipelines and accessories with a maximum allowable pressure of
more than 0.5 bar above atmospheric. Flowmeters are considered as piping.
Technical data
11.13 PED
SITRANS MASS 2100 & FC300 (FCT010/DSL)
Operating Instructions, 06/2020, A5E39788682-AB
117