Bus Set-Up; General; Setting Up An Io Bus - Stulz S-Klima C7000 User Manual

9.2 Bus set-up

9.2.1 General

The IO bus consists of a maximum of 20 participants. On the C7000 system, only C7000 IOC or C7000AT participants
can be in the IO bus.
Each bus participant has its own IO bus address which must only appear once in the data bus.
The IO bus addresses range from 0 to 19.
The display of the C7000AT shows the IO bus addresses in the bus overview (start up window) as follows.

9.2.2 Setting up an IO bus

The bus is set up automatically, meaning that all connected bus participants "register" themselves to the bus and
automatically deregister themselves in the case of a fault.
The following prerequisites have to be fulfilled for this:
1. Each bus participant has a bus address, which may only appear once in the bus.
2. There must be no bus addresses larger than 19.
3. All bus participants are correctly connected with bus cables according to the requirements (see next page).
4. The bus must be terminated at the start and at the end.
Each bus participant saves the last bus configuration known to it when it is switched off. It also expects this when it
is switched back on.
If it detects that new units have been registered to the bus whilst it was switched off when it is switched back on, these
are entered immediately into the bus configuration without a signal or an alarm being outputted.
If it detects that a unit that was an active bus participant before it was switched off has disappeared from the bus, a
bus error is issued for it once the alarm time delay has elapsed.
The same happens if a bus participant (IOC or C7000AT) is de-energized during operation.
A bus error is detected automatically by all units connected to the bus and is therefore displayed on all ATs and IOCs.
BA C7000 for EC Tower | EN | 01-2019 | 1000755
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