Technical Documentation
BLR-CM Modbus
Rev. 05
2018-09
17
Alarm Output Mask 2 (OM2)
Bit 15
Bit 0
Bit 0
FREQUENCY Alarm
1 = Selected
0 = Deselected
Bit 1 - 15
Reserved
X
X
3.6
Stage status
Information about every stage are stored in the stage database. The referring information is available in different data
types. The following bit assignment is used in the subsequent registers.
Output
Bit 15
Bit 0
S1 – S12
Output of stage 1 to 12
1 = Closed
0 = Open
The base addresses and the data types can be found in the table below. All values can be accessed with function codes
03
hex and
04
hex
.
Address
Value
Words
Type
Units
768
Fast stage (1 = fast, 0 = normal)
1
UINT16
-
769
Fix stage (1 = fix, 0 = automatic)
1
UINT16
-
770
Fix stage on/off (1 = on, 0 = off)
1
UINT16
-
772
Stage status (1 = defective, 0 = o.k.)
1
UINT16
-
1280
Switching state (1 = on, 0 = off)
1
UINT16
-
In the current firmware version it is possible to switch stages manually via Modbus. In order to switch a stage, the
respective stage must be set to “1” under address 769. After this preparation, the stage can be switched on or off using
the bits in address 770. While switching, the discharge time of the respective stage is considered.
Attention: Switching compensation stages via Modbus must not be done as long as it is not ensured that nobody is
working at the compensation system.
Attention: Performing changes in register 769 result in switching all stages off and according to the respective setting
on again.