janitza UMG 96-S2 User Manual

UMG 96-S2 www.janitza.com
30
9. Communication via the RS485 interface with the
Modbus RTU protocol
Via the Modbus RTU protocol with CRC check
on the RS485 interface, you will attain
· Data from the parameter list and
· Measured values from the Modbus address list.
Setting range of the device addresses: 1 .. 247
Standard setting: 1
Standard setting for baud rate in kbps: 38.4
Modbus functions (slave)
04 Read input registers
06 Preset single register
16 (10Hex) Preset multiple registers
23 (17Hex) Read/write 4X registers
The order of the bytes is high byte before low
byte (Motorola format).
Transmission parameters:
Data bits: 8
Parity: odd, even, none (1 stop bit), none (2 stop
bits)
Stop bits (device): 1/2
Stop bits, external: 1/2
Number formats: short 16 bit (-2
15
.. 2
15
-1)
float 32 bit (IEEE 754)
NOTE
· The device does not support a broadcast
(address 0).
· The telegram length may not exceed 256 bytes.
Example: Reading out the voltage L1-N
The voltage L1-N is archived
· in address 19000 of the measured value list.
· in FLOAT format.
The device address for the device is accepted
here with address = 01.
The “Query message” then appears as follows:
Designation Hex Remark
Device address 01 UMG 96-S2, address = 1
Function 03 “Read holding reg.”
Start address Hi 4A 19000dec = 4A38hex
Start address Lo 38
Number of Hi values 00 2dec = 0002hex
Number of Lo values 02
Error check (CRC) -
The “Response” of the device can then appear
as follows:
Designation Hex Remark
Device address 01 UMG 96-S2, address = 1
Function 03
Byte counter 06
Data 00 00hex = 00dec
Data E6 E6hex = 230dec
Error check (CRC) -
The voltage L1-N read by the address 19000 is
230 V.

janitza UMG 96-S2 Specifications

General

Brand	janitza
Model	UMG 96-S2
Category	Measuring Instruments
Language	English