Weishaupt EM3/2 - Page 13

Installation and operating instruction
Fieldbus module EM3/2
7 Technical documentation
83296302 1/2018-01 La
13-32
Byte Bit Information Description
AB1 0 Deactivate heat demand Deactivates heat demand via Bus (Bit 0 in AB0)
1 not used –
2 Modulation default LS-Bit Activates the modulation default:
Bit 2 = 0, Bit 3 = 0: controller (T6/T7/T8)
Bit 2 = 1, Bit 3 = 0: Inputs Plus and Minus in AB0
Bit 2 = 0, Bit 3 = 1: degree of modulation in % in AB2
Bit 2 = 1, Bit 3 = 1: degree of modulation in 0.01 % in
AB2 and AB3
3 Modulation default MS-Bit
4 … 7 not used –
from C-Transfer
AB2 0…7 Degree of modulation default in
%
– or –
degree of modulation default in
0.01%
LowByte
If AB1 Bit 2 = 0 and Bit 3 = 1:
Gas operation:
Degree of modulation default in %
Oil operation:
Degree of modulation default ≤ 25 % = stage 1
Degree of modulation default ≥ 75 % = stage 2
If AB1 Bit 2 = 1 and Bit 3 = 1:
Gas operation:
Degree of modulation default in 0.01 % (10000 equal
to 100 %)
Oil operation:
Degree of modulation default ≤ 25 % (2500) = stage
1
Degree of modulation default ≥ 75 % (7500) = stage
2
AB2 is the LowByte and AB3 the HighByte.
from D-Transfer
AB3 0…7 Degree of modulation default in
0.01%
HighByte
If AB1 Bit 2 = 1 and Bit 3 = 1:
Gas operation:
Degree of modulation default in 0.01 % (10000 equal
to 100 %)
Oil operation:
Degree of modulation default ≤ 25 % (2500) = stage
1
Degree of modulation default ≥ 75 % (7500) = stage
2
AB2 is the LowByte and AB3 the HighByte.
from E-Transfer
AB4 0…7 not used –