MoTeC PDM30 - Manual (Page 21)

18 Configuration
Channel Name Description CAN Output
InputName Input Status
0 = Off
1 = On Yes
InputName.Voltage Voltage on the input
Resolution 0.2 V Yes
CAN Inputs
The PDM can receive CAN messages allowing the outputs to be controlled by
other devices.
The PDM can be configured to receive CAN messages on up to seven
different CAN addresses in the standard or extended address ranges. The
CAN addresses and message timeout periods are configured in Global Setup
in the Configuration Tree.
To configure a CAN input

In the Configuration Tree, select CAN Inputs

On the Edit menu, click Add

Type a channel name and select settings as required
Channel extraction
Channels are extracted from the CAN messages by specifying the CAN
message and a byte offset within the message. Optional bit masking, byte
swapping and dividing operations can be performed on the received channel,
depending on the data size (8bit, 16bit signed or 16bit unsigned).
8 Bit Values
An 8bit value is specified with a byte offset and an 8bit mask. To use the
entire 8bit value, set the mask to FF (hex).
16 Bit Signed Values
A 16bit signed value is specified with a byte offset (the first byte of the
value within the CAN message), an optional byte swap, and a divisor (1 to
255). The resulting channel will be an 8 bit value with a range of 0 to 255.
The PDM treats the received value as a signed 16 bit value (i.e. -32768 to
32767). Negative values are clamped to 0. If the value after division is
greater than 255 then the result value will be clamped to 255.