WaveWare RCD-1 - Manual (Page 8)

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6. Control Output
The RCD-1 has 1 relay output. The output is a Form A, 2A rated contact, SPST-NO, with a 10mA
minimum current load and a 2A maximum current load, and a 30VDC and 30VAC maximum voltage
rating.
When configured for relay command control mode, certain commands are used to set and clear the relay.
The commands must be a series of numeric digits sent to one of the RCD-1’s addresses. The RCD-1
responds to commands in a manner very similar to Motorola’s DataNet paging receivers. When configured
for serial data output, a particular address can be configured to perform a relay control function as each
message is received.
Upon power up, RCD-1 can set the relay output to whatever state was stored in the EEPROM prior to the
last power down or to a state configured in the programming software.
RCD-1 Output Control Commands are in the following format:
Function Code + Command Code + Sub-Address + Data + Checksum
The Sub-Address and Checksum are optional. If sub-addressing is enabled in the RCD-1 receiver, then the
Sub-Address field is required. If checksum processing is enabled in the RCD-1 receiver, then the
Checksum field is required.
The Function Code determines what function is going to be performed, or which control output is going to
be acted upon.
The Command Code tells the logical polarity of the output, or what to do with the output referenced in the
Command Code.
The sub-address field can be used to specify an individual RCD-1 receiver within a group of receivers
configured to share a common CAP Code, or as a password used to validate output commands. Two
passwords of up to 10 characters in length can be configured in the RCD-1 receiver. When used as sub-
addresses, one can be used as an individual address and the other as a group address.
The Data field is used to control the relay output. The number in the data field is the polarity to set the
relay to. The number in the field must be either a “0”, or a “1”. A “0” will deactivate the relay, and a “1”
will activate the relay.
The Checksum is a bit-for-bit EXCLUSIVE OR function across every ASCII byte in the command. The
result of the XOR is converted to a two-byte HEX ASCII code. See the example for details. If you do not
wish to use a checksum at the end of the message, you can disable it with the programming software.
Function Code Command Code Description
70 00 No output change
14 Configure state of the relay.
77 Output Relay
10 Deactivate relay
11 Activate relay
12 Cycle (activate, delay, deactivate)
13 Cycle (deactivate, delay, activate)
Command Examples:
To send a command to activate the relay, the following command could be sent:
7711
An alternative way to activate the relay is:
70141