20
The output operation will be different depending on the configuration chosen for the output.
1. Disabled, MODE = 0
It is recommended to disable any outputs that aren’t being used. Putting a “0” in the mode for an output disables the output and
prevents it from being turned on.
2. On/Off, MODE = 1 (Used for Discrete Operation)
This puts the output into the standard discrete operation mode. The use of bit pairs in Control Message 1 of PGN 61408 will turn the
output on or off.
High Bit
Low Bit
On
0
1
Off
0
0
3. Data, MODE = 2 (Used for PWM Control using a value of 0-4000)
This puts the output into PWM control with a value of 0 - 4000 equaling 0 - 100% of the duty cycle. Two bytes are allocated for each
of the PWM control messages with the first 12 bits being used for the value. The first byte and the first 4 bits of the second byte are
put together for 12 bit control of the output.
Example
Second Byte
First Byte
50%
Bit 4
Bit 3
Bit 2
Bit 1
Bit 8
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
2000
0
1
1
1
1
1
0
1
0
0
0
0
4. Percent, MODE = 3 (Used for PWM Control using a value of 0-1000 (= 0-100.0%))
This puts the output into PWM control with a value of 0 - 1000 equaling 0 - 100.0% of the duty cycle. Two bytes are allocated for each
of the PWM control messages with the first 12 bits being used for the value. The first byte and the first 4 bits of the second byte are
put together for 12 bit control of the output.
Example
Second Byte
First Byte
50%
Bit 4
Bit 3
Bit 2
Bit 1
Bit 8
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
500
0
1
1
1
1
1
0
1
0
0
0
0
5.2.4 OUTPUT OPERATION
