Page 20 Instruction manual Parker X-Flow FM-1407 Rev - 11/2021
More detailed information about Modbus® can be found at
website of the (local) Modbus® organization of your country (where available).
3.5.3 Response time
This slave device will respond on each valid request from the master within 100 msec. This means that
the response timeout setting of the master should be set to a value larger than or equal to 100 mS.
3.5.4 Supported Modbus® functions
This section describes the supported Modbus® function codes. Refer to document [1] “MODBUS®
Application Protocol Specification V1.1b, December 28, 2006” for more details.
More detailed information about Modbus® can be found at
website of the (local) Modbus® organization of your country (where available).
Read Holding Registers (03)
Possible exception responses:
•
02, ILLEGAL DATA ADDRESS, in case of reading of non-existing address, or reading a part of a
multi-register parameter (float, long, etc)
•
03, ILLEGAL DATA VALUE, in case of reading less than 1 or more than 125 registers
•
04, SLAVE DEVICE FAILURE, in case of reading a write-only register
The maximum message size for the Read Holding Registers function is 100 bytes at 9600
baud (200 bytes at 19200 baud and 400 bytes at 38400 baud). When this size is exceeded,
corrupted responses may be received.
Write Single Register (06)
Possible exception responses:
•
02, ILLEGAL DATA ADDRESS, in case of writing to non-existing address, or writing to a part of a
multi-register parameter (float, long, etc)
•
04, SLAVE DEVICE FAILURE, in case of writing to read-only register
•
04, SLAVE DEVICE FAILURE, in case of writing illegal value to register
Write Multiple Registers (16)
Possible exception responses:
•
02, ILLEGAL DATA ADDRESS, in case of writing to non-existing address, or writing to a part of a
multi-register parameter (float, long, etc)
•
03, ILLEGAL DATA VALUE, in case of reading less than 1 or more than 123 registers
•
04, SLAVE DEVICE FAILURE, in case of writing to read-only register
•
04, SLAVE DEVICE FAILURE, in case of writing illegal value to register
When one of the written registers raises an exception, the value written to all subsequent registers are
discarded (ignored).
!
Parameter
Options
Remarks
Addressing
address configurable from 1 to
247 (default 1)
see section 3.5.1
broadcast support Yes
baud rate
9600, 19200 (default), 38400
see section 3.5.1
parity
None, Odd, Even (default)
see section 3.5.1
transmission
mode
RTU/ASCII
Auto detection
data bits
RTU=8, ASCII=7
not configurable
electrical interface RS485 2W-cabling
See document:
FM1263 - Hook-up diagram Series II B
(Basic)
connector type
DB9 Male
See document:
FM1263 - Hook-up diagram Series II B
(Basic)
Содержание X-Flow FM-1407
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