janitza UMG 103-CBM - Device Addresses; RS-485

www.janitza.com UMG 103-CBM
39
CAUTION
Material damage due to incorrect network
settings.
Incorrect network settings can cause faults in the IT
network.
Consult your network administrator for the cor-
rect network settings for your device.
9.2 Device addresses
If several devices are connected to each other via
the RS-485 interface, a master device can only
distinguish these devices on the basis of their de-
vice address. Within a network, each device must
therefore have a different device address.
The device address can be configured via the
rotary selector switches available on the UMG
103-CBM. Addresses in the range of 1 to 99 can
be set here.
INFORMATION
In the RS-485 bus structure, assign the slave de-
vices (UMG 103-CBM) via the coding switches:
· Different device addresses.
· Device addresses that are different than the
master device (e.g. UMG 604-PRO).
The UMG 103-CBM recognizes the transmission
rate (baud rate) automatically.
INFORMATION
· Broadcast (address 0) is not supported by the de-
vice.
· The telegram length must not exceed 256 bytes
X10 X1 Function
0
1
2
4
6
7
5
3
8
9
The device address 00
is reserved and must not
be assigned for operation
with Modbus communi-
cation.
The device address 99
can be obtained by setting
the rotary selector switch
X10 to 9 and X1 to 9.
No higher value device
address can be set for the
UMG 103-CBM.
Example: Setting the
device address to 13
Standard factory setting:
Device address 1
Tab. Setting device addresses via coding switches
0
1
2
4
6
7
5
3
8
9
0
1
2
4
6
7
5
3
8
9
0
1
2
4
6
7
5
3
8
9
0
1
2
4
6
7
5
3
8
9
0
1
2
4
6
7
5
3
8
9
0
1
2
4
6
7
5
3
8
9
0
1
2
4
6
7
5
3
8
9
9.3 RS-485
The device sends and receives data via the RS-
485 interface. For example, the device receives
data from the parameter and measured value list
via a MODBUS RTU protocol with CRC check.
Modbus functions (slave)
03 Read Holding Registers
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 before low byte
(Motorola format).
Transmission parameters
Data bits: 8
Parity: odd
even
none (1 stop bit)
Stop bits: 1 / 2
Number formats
short 16 bit (-2
15
.. 2
15
-1)
Float 32 bit (IEEE 754)