ABB 07AC91, Руководство по эксплуатации

Страница: 68 / 124

Installation 4 – 20
Advant Controller AC 31 / Issued: 08.99
3
4.5.3 Addressing slave basic units or remote extension units on the CS31 system bus
Figure 26: Rotary switch for addressing the remote extension unit ICMK 14xx
The CS31 system bus protocol is a master/slave protocol: the master sends requests to the
slaves which are indicated by an address between 0 and 61.
The master basic unit can manage up to 31 remote units (CS31 system bus addresses).
A remote unit may be:
Õ
- a non-extensible remote unit
Õ
- an extensible remote unit with digital extensions
Õ
- an ABB variable speed drive via NCSA-01
Õ
- a high-speed counter
Õ
- a basic unit (50 series with extension capabilities, 90 or 30 series)
Warning: An extensible remote unit ICMK 14xx with analog extensions occupies two
addresses.
The master basic unit and the remote units may be positioned in any order on the bus. The
order of the extensions on the basic units and extensible units is free.
Addressing does not correspond to the order of the units on the bus. The addresses from 1 to
61 may be assigned in any order to the remote units: the first remote unit on the CS31 system
bus may be assigned address 5, followed by a remote unit with address 3, followed by a
remote unit with the address 12 and so on.
Õ
Addressing centrally extensible remote units with CS31 system bus connection
The slave number of the extensible remote units is given by the rotary switch located beneath
the first cover on the front. The settings on each switch may be from 0 to 9. Switch 1 indicates
tens and switch 3 is for units (see Figure 26). Values greater than 61 are not allowed. 0
≤
X
≤
61.
Restrictions for analog extensions:
- A maximum of 2 XM 06 B5 extension units + 4 digital extension units may be used.