Sea Air and Land Communications 1290 User Manual
SALCOM 12-90 PAGING TRANSCEIVER AND STORE FORWARD REPEATER Issue 1290UB 0211
Sea Air and Land Communications Ltd
Page 9
23409
Trigger received signal strength message to be sent to SERIAL
PO R T - but not transmitted.
Serial port message will be: caN N N N N N N 1 01:-87dBm. W here N
is the first C ap code specified in the first C ap range and 01 is the
ID of the responding unit.
PO R T - but not transmitted.
Serial port message will be: caN N N N N N N 1 01:-87dBm. W here N
is the first C ap code specified in the first C ap range and 01 is the
ID of the responding unit.
SALCOM 12-90 PAGING TRANSCEIVER AND STORE FORWARD REPEATER Issue 1290UB 0211
Sea Air and Land Communications Ltd
Page 10
MESSAGE ACKNOWLEDGMENT
Using a virtual output a message can be automatically acknowledged. If both source and
destination are 12-90 units then this is very easy to implement. With systems using a 12-90
as an endpoint, systems can be configured with absolute certainty of delivery without
corruption.
destination are 12-90 units then this is very easy to implement. With systems using a 12-90
as an endpoint, systems can be configured with absolute certainty of delivery without
corruption.
Example 1: To acknowledge a message that has been transmitted to a 12-90 (unit ID 23).
In this example the user wishes to have acknowledgement when a particular message is
received by the 12-90.
In this example the user wishes to have acknowledgement when a particular message is
received by the 12-90.
The user transmits: CA1234567<SPACE>1<SPACE> Pump Failed 23069<CR>
When the message is received by the 12-90 a virtual output is controlled which triggers the
input 2 high message. The input 2 high message has been previously programmed to be:
CA1234560 4 Message Acknowleged<CR>
input 2 high message. The input 2 high message has been previously programmed to be:
CA1234560 4 Message Acknowleged<CR>
Example 2: The user wishes to control the relay at a destination 12-90 unit and wishes to
acknowledge when this output has closed. A simple back to back telemetry system can be
implemented driven from automatic acknowledgments.
acknowledge when this output has closed. A simple back to back telemetry system can be
implemented driven from automatic acknowledgments.
The system has 2 12-90s, unit ID 23 and 24. When input 1 on unit 23 is closed the user
wishes the relay on 12-90 unit ID 24 to close. When the relay has closed on unit 24 the
user wishes the relay on unit ID 23 to close as well to mirror the controlled relay state:
wishes the relay on 12-90 unit ID 24 to close. When the relay has closed on unit 24 the
user wishes the relay on unit ID 23 to close as well to mirror the controlled relay state:
Unit 23:
•
The input 1 low message is configured as CA1234567 1
240169
240169
•
The input 1 high message is configured as CA1234567 1
241609
241609
The configured messages for unit 23 closes both the physical relay and triggers the virtual
output that transmits configured input 2 messages.
output that transmits configured input 2 messages.
Unit 24:
•
The input 2 low message is configured as CA1234567 1
23019
23019
•
The input 2 high message is configured as CA1234567 1
23109
(NOTE: Input 2 is not used on this unit)
23109
(NOTE: Input 2 is not used on this unit)
Example 3: The user wishes to deliver any message to the 12-90, and have absolute
confidence that the message was received without corruption.
confidence that the message was received without corruption.
The user sends the message “test” to unit id 01: CA1234560 1 test 01079<CR>
The virtual output control code “01079” must be added anywhere into the message. This
will trigger unit 01 to respond with: 010A02E1<CR>
will trigger unit 01 to respond with: 010A02E1<CR>