New R2.0b firmware on the SNAP-SCM-CAN2B makes it possible to both transmit and receive data.
When you enable transmit functionality, all data communications between the module and the SNAP PAC brain or controller are ASCII encoded and frame delimited for robust communications.
The new integration kit, part number PAC-INT-CAN-RXTX, is a free download. It helps you use PAC Control CAN-specific commands more easily by providing sample charts and subroutines that you can add to your own strategy and modify as needed.
A little history
Receive only. The SNAP-SCM-CAN2B was originally issued as a receive-only module (firmware R1.0d or lower), so some of you may already be using it. If you are, you don't need to change anything unless you want to transmit as well. Newer modules are backwards compatible, so you can add more modules if you need to. An older CAN integration kit works with modules that have firmware R1.0d or lower; it is for receiving data only. This older kit has a new part number, PAC-INT-CAN-RX (previously PAC-INT-CAN).
Transmit and receive. If you have an older module and now want to transmit as well as receive data, you can download the newer firmware and then follow steps in the PAC Manager User's Guide (form 1704) to update the firmware. Then you'll use the newer integration kit, PAC-INT-CAN-RXTX.
Here's a chart that sums it up:
|Purpose||Use firmware||Use integration kit|
|Transmit & receive||R2.0b or higher||PAC-INT-CAN-RXTX|
|Receive only||R1.0d or lower||PAC-INT-CAN-RX|
Questions? Contact Opto 22 Product Support.