VEGA VEGACOM 557 Modbus protocol - Manual (Page 22)

22 VEGACOM 557 Modbus
Adjustment possibilities for DIL switch block 2 on
additional board
Adjustment possibilities for DIL switch block 3 on
additional board
Switch adjustments on VEGACOM 557
Note:
With the switch for the adjustment of the Mod-
bus address (DIL-switch block 3), it is theo-
retically possible to adjust addresses in the
range of 0 to 255. However, in reality only
address 1 to 246 are directly adjustable.
Address adjustments outside the range are
converted as follows:
Addr. 000 becomes Addr. 245
Addr. > 247 become Addr. 245
Addr. = 255 becomes Addr. 246
If VEGACOM 557 is used as replacement
unit for VEGACOM 556, Addr. 245 has to be
adjusted as Modbus address.
DIL switch block 2
(additional board)
Selection of the baud rate
Number of data bits
1200
600
300
8
7
Factory setting
9600
2400
19200
4800
38400
Parity
none
odd
even
Protocol mode
Modbus ASCII
Modbus RTU
DCS measured value image
(only relevant on VEGAMETs)
all meas. values Met 1,
all meas. values Met 2,
etc.
1. meas. value Met 1,
1. meas. value Met 2,
etc.
1 2 3 4 5 6 7 8
ON
DIL switch block 3
(additional board)
Modbus address of
VEGACOM 557
(Adr. 001 to 246)
Factory setting
e.g.:
Adr.
= 007
1 2 3 4 5 6 7 8
ON