Advent Communications
209297 – DCU5000 Drive Control Unit Page 20 of 42
5. REMOTE CONTROL
5.1. INTRODUCTION
The DCU5000 is designed to be operated remotely by a SatFinder, ACU control
system. The unit is controlled using a remote command set, which is documented
here.
The remote command set enables control of all operational functions of the unit and
querying of the current status of the unit.
The complete list of user commands and queries available with this unit is listed in the
following tables.
5.2. SET UP
5.2.1. INTERFACE
The DCU5000 only has an RS485 remote interface. See section 3.2 for RCM
connector wiring.
5.2.2. BAUD RATE
The DCU5000 remote interface has a fixed baud rate of 9600.
5.2.3. ADDRESS
The DCU5000 has a fixed address of 180.
5.2.4. SETUP INSTRUCTIONS
Any remote control and monitoring software (not supplied) must have the following
parameters set:
• RS485 interface. (4 wire version)
• Address: 180.
• Baud rate: 9600.
• 8 data bits, no parity, 1 stop bit.
5.3. PACKET STRUCTURE
Advent uses a non-printable packet format. This means that the full range of 255
ASCII characters can appear in the message.
The format of all messages is:
[STX] [BYTE COUNT] [ADDRESS] [DATA....] [CHECKSUM] [ETX]
STX (start of transmission)
STX is the ASCII character 2. It is one byte in size and is used to represent the start of
each message.
BYTE COUNT
The BYTE COUNT is one byte in size and is the total number of bytes in the packet,
i.e. number of data bytes plus five (one each for STX, BYTE COUNT, ADDRESS,
CHECKSUM and ETX).
ADDRESS
The ADDRESS is one byte in size. This is the address of the equipment to which the
packet is being sent. Unique addresses can be in the range 001 to 255.
DATA
This is the actual data being sent to the equipment. In any one packet, the maximum
number of data bytes is 250. The DATA section includes the remote command and
any associated parameters.
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