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Appendix A – NMEA 2000
This appendix is intended to relate specific characteristics of the CLMD12 to how they are
communicated via NMEA 2000
implemented by the CLMD12 is compatible with other NMEA 2000
complete description of the messages. If you require detailed information on the messages,
please obtain a copy of the NMEA 2000
Electronics Association (www.nmea.org).
CLMD12 NMEA 2000
PGN 127500 – Load Controller Connection State/Control
The CLMD12 uses this PGN to transmit the state of each of the breakers. A separate occurrence
of this message will be transmitted for each breaker. The state of each breaker may be controlled
by issuing a 126208 NMEA Command for this message addressed to this device.
Field 1: Sequence ID – This field is transmitted with a value of 255.
2: Connection ID – This field identifies the output channel (breaker) whose status is being
reported in this message. The value of this field will be in the range of 0 (Breaker #1)
through 11 (Breaker #12).
3: State – This field indicates the state of the solid-state breaker.
4: Status – This field indicates the status of the solid-state breaker.
5: Operational Status & Control – This field is used to lock and unlock the solid-state
breaker.
6: PWM Duty Cycle – This field is used to control and report the PWM duty cycle of the
solid-state breaker.
7: TimeON – This field is used to report the ON time if the solid-state breaker is running
under the control of a Flash Map.
8: TimeOFF – This field is used to report the OFF time if the solid-state breaker is running
under the control of a Flash Map.
PGN 127501 – Binary Status Report
The CLMD12 uses this PGN to transmit the state of each of the breakers and connected switch
inputs. The state of the breakers may be controlled by issuing a 126208 NMEA Command for
this message addressed to this device.
Field 1: Indicator Bank Instance – This field identifies the particular switch bank to which this
PGN applies. Please refer to Section 3.5.1.2 for instructions on how to program the
value of this field.
2: Indicator #1 – This field indicates the state of the solid-state breaker on output channel
#1. The state will be one of the following values:
• "OFF" – The breaker is open – no current is supplied to the load.
• "ON" – The breaker is closed – current is supplied to the load.
• "Error" – The breaker is open due to an error condition
Revision 1.5
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messages in order to help ascertain whether the messaging
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standard documents from the National Marine
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Periodic Data Transmitted PGNs
Appendix A – NMEA 2000 Interfacing
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Interfacing
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products. It is not a
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