Siemens SED2 User Manual download pdf (Page 19)

AOP Applications

Siemens Building Technologies 11

AOP Applications

NOTES:

1. If the AOP is the command source for the SED2, set USS Telegram Off Time for Serial

Interface BOP Link P2014[1]=5000 (5 seconds). To do this, first set P0003=3. The

P2014[1]=5000 setting causes the drive to trip if communications with the AOP control source

is lost.

2. If you have problems connecting to the SED2 drives, set the Auto Baud to OFF and the

default baud rate to the same as the SED2.

Single Drive Control Using the AOP

Per default, the AOP is configured to work with only one SED2 in Local mode. In Local mode, the

AOP normally mounts directly onto the SED2. The RS-232 and RS-485 ports handle

communications. Full operator control of the SED2 is available with access to all normal drive and

AOP internal parameters.

To configure a single SED2 VFD with the AOP as the control source, follow the procedure in the

Quick Commissioning section of this manual.

Network Setup (RS-485 with Panel Mounting Kit)

The AOP has the capability to control up to 31 SED2 VFDs connected as a network. In a network

configuration, a unique two-digit number identifies each VFD. When the AOP connects to a

network of SED2 VFDs, there are two Master Modes of operation:

• The AOP can access a single SED2 VFD on the network with full control/parameter access

• The AOP can use the Broadcast mode to simultaneously start/stop all drives on the network.

Use the following procedure to set up a network of SED2 VFDs under control of an AOP:

1. Use the standard panel mounting kit (PMK) to connect RS-485 communications as follows:

a. Correct wiring for PMK and SED2 VFD is as follows:

Pin 3 = +24V

Pin 4 = 0V

Pin 29 and 30 = RS-485 communications

b. Use twisted pair cable or shielded cable (preferred).

c. The end-of-line SED2 VFD must have a 120-ohm terminating resistor across RS-485

Pins 1 and 2.

d. Use a common ground for all SED2 VFDs and the PMK.

e. For the first issue of the PMK, for correct communications DIP Switch 1=UP or ON on

the PMK board.

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Siemens SED2 User Manual Page 19