Operating Instructions

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Siemens Modbus för SOC7-128, slave mode SE1Z5996en7
Building Technologies 3 Connection and Configuration 2015-08-26
Multibox Ahu, (relay unit) Group User zones Comment
1 1 A 1 Office hour 07:00 – 17:00
2 1 A 1
3 2 B 1
4 2 B 2 Office hour 08:00 – 20:00
5 3 C 3 Office hour 07:00 – 18:00
6 3 C 3
7 4 D 3
8 4 D 3
Groups:
Groups refers to the groups in the SOC7-128.
In the example system there are 4 groups. Each group interlocks its corresponding
dampers and also its ahu, this is controlled by the SOC7-128.
In this system group A consists of Ahu1 and multibox 1,2 and group B consists of Ahu2
and multibox 3,4 etc.
User zones:
The SOC7-128 does not handle user zones and therefore must such zones be
managed via modbus communication. In the example system user zones 1 consists of
multibox 1-3, user zone 2 of multibox 4 and user zone 3 of multibox 5-8.
If user zone 1 is interlocked but not user zone 2 the Ahu2 mustn’t stop, but if also user
zone 2 interlocks the Ahu2 must stop.
To be able to create such configuration the possibility to choose if the ahu should stop
or not has been implemented when interlocking individual multiboxes.
Important!
The integrator has to take care not to close all dampers while the fan is still running.
3.2 General
The RS485 interface is present on the SOC7-128.