User's Manual

Table Of Contents

SALCOM 12-90 PAGING TRANSCEIVER AND STORE FORWARD REPEATER Issue 1290UB 0211

Sea Air and Land Communications Ltd Page 7

taken.

231509 Will close relay and virtual output 5 on a unit with the ID of 23.

230159 Will open relay and virtual output 5 on a unit with the ID of 23.

SALCOM 12-90 PAGING TRANSCEIVER AND STORE FORWARD REPEATER Issue 1290UB 0211

Sea Air and Land Communications Ltd Page 8

VIRTUAL OUTPUTS AND CONTROL

Virtual outputs are a used to invoke 12-90 actions remotely. These actions include control

over triggering of inputs and periodic messages. Virtual outputs can be used to return

information about the last received message, such as the received signal strength and

checksum information.

Virtual outputs are addressed in exactly the same fashion as the on board relay.

The following examples assume a unit ID of 23.

Control

Message

Function

23109 Close on board relay

23019 Open on board relay

23059 Trigger Input 1 high message to be transmitted

23509 Trigger Input 1 low message to be transmitted

23069 Trigger Input 2 high message to be transmitted

23609 Trigger Input 2 low message to be transmitted

23709 Trigger periodic message to be transmitted

23079 Trigger the unit ID, message length and checksum to be

transmitted.

A message of “CA1234560 2 test 01079” will result in unit 01

responding with “010A02E1” where first 2 digits are the

responding unit ID, the second 2 digits are the message length in

hex, the last 4 digits are the message checksum in hex. The

length and checksum are calculated over the message payload

“test 01079”. The checksum is the sum of each ASCII value in

the message (e.g. 116+101+115...). The responding unit will use

the same cap code as used by the “serial passthrough” mode of

operation.

23089 Perform a system reset.

23809 Trigger received signal strength message to be transmitted. This

is the signal recorded when this message is received. This

feature is valuable for checking system health or for initial system

configuration. This message is transmitted to the first cap code

programmed in the first cap code range. The first 2 characters of

the returned message is the unit ID of the responding unit.

Returned example message will be: 01:-87dBm.