Volume flow indicator / monitor / transmitter SENSO-X® VPX
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| Sensors PG1 | Data sheet No. 13170 | Version 03-2020
The sliding switch S5 is for inserting a 120 ohm terminal resistor.
Ex factory the switch is in off-position (OFF pos. = left).
Default (factory) Modbus settings
Baud rate:
9600
data bits:
8
start bits:
1
stop bits:
1
Modbus address: 1
parity:
even
The following Modbus parameter options are available via the menu or the NFC tool configuration program:
bus adresse:
1-127
baud rate:
9.6k, 14.4k, 19.2k, 56k
parity:
even (1 startbit, 8 datenbits, 1 stopbit),
odd (1 startbit, 8 datenbits, 1 stopbit),
none (1 startbit, 8 datenbits, 2 stopbits)
Implemented Modbus function: Read Holding Registers function 0x03
Register PWM
address
Name
File type
Raw data
Description
0 (0x00)
40001
pressure
unsigned 16
0 to 1,000 or 4,000
measured differential pressure in Pa
1 (0x01)
40002
limit (low word)
unsigned 32
0 to 65,535
Set limit value in selected unit
of measure, see register 7, e.g.
0 to 99,999 m³/h
2 (0x02)
40002
limit (high word)
0 or 1
3 (0x03)
40004
output analog
unsigned 16
0 or 1
0 = 0 – 20 mA or 0 – 10 V
1 = 4 – 20 mA or 2 – 10 V
4 (0x04)
40005
unassigned
5 (0x05)
40006
flow (low word)
unsigned 32
0 to 65,535
calculated volume flow in m³/h
0 to 99,999
6 (0x06)
40007
flow (high Word)
0 or 1
Modbus connection diagram:
Note:
Floating switch contacts “CO, “NC” and “NO” may only be used for 230 V AC or
24 C AC/DC .
Disconnection or electrical protection equipment must be provided by the
customer. The 24V AC/DC supply voltage requires a local fuse for max. 6 A or
a supply unit with a power output limit of 6 A.
Caution:
All cable installation and connection work must be left to a duly qualified elec-
trician. Make sure that all cables are connected in accordance with the relevant
electrical regulations. The cable sheath must reach as close as possible to the
terminals. Braided wires longer than 10 mm must be secured near the terminal
with a cable clip or similar or must be insulated in pairs using, e.g., suitable shrink
tubing (see installation example).
Installation example
:
Terminal J1 only present in bus version.
For electrical connections see previous page.
Modbus RTU
Overview of registers
