Citect for Windows Driver Specification DanBuss DNIP Driver

1.1 Introduction
This section defines the types of I/O Devices that are targeted by this driver.
1.2 Device Manufacturer
Danfoss System Control A/S (DSC)
Hørkær 12B
DK-2730 Herlev
Denmark
+45 42 841622
1.3 Device Definition
DanDuc (Danfoss part #088G0500) or
MPV (Danfoss part #088B0089, this model is old and not sold anymore)
Driver Design Specification
1. Target Device(s) and Protocol
These devices are the digital substations (DSS) that DSC and their partners configurate and program
for different building automation projects. They have a configurable number of I/O’s (digital input,
analog input, analog output etc). The maximum is 64 I/O’s of one type, and a total of about 128
I/O’s.
GW-PC version 2.10 (Danfoss part #088F3101).
This is the concentrator unit that is used to route and convert packets from the RS-485 DanBuss to
the RS-232 DNIP protocol.
1.4 Communications Method
Serial RS-232 to GW-PC. From GW-PC to DanDuc / MPV’s the Danfoss DanBuss RS-485 is used.
1.5 Communications/Hardware Configuration
The GW-PC is connected to the PC using the ‘PC-GW PC Cable’ directly to a RS-232 port. The
DanDuc’s / MPV’s are connected to the GW-PC using a multidrop bus topology (one pair, twisted,
AWG24 or similar). The terminations are turned on at each end of the bus. If the cable length is to
exceed 1200 m (AWG24), a DanBuss repeater has to be used. The GW-PC and DanDuc / MPV
uses 24 VAC, 50 Hz. The GW-PC may be located anywhere on the bus. See the GW-PC manual
for more detailed setup instructions.
DanBuss DNIP.doc 4