14
Rev. 1.0
0006302011
SSM23C User Manual
+86-400-820-9661
3.2 Connecting the SSM23C Communications
The communications interface for the SSM23C is two standard 3-pin spring clamp connectors.
A special cable designed to work with the serial port for configuration is included. The SSM23C
is configured using a combination of rotary switches and an RS-232 serial link, and then may
be deployed on a distributed CANopen network. The RS-232 interface is used for configuration,
tuning, node ID setting and Q program downloading. The CANopen network should be connected
in a daisy-chain fashion, with a 120 ohm terminating resistor at each end of network.
Locate the SSM23C within 2.5 meters of the PC. Plug the DB9 connector of the communication
cable that came with the drive into the serial port of the PC. Plug the 3-pin spring clamp connector
into the appropriate connector on the SSM23C. Secure the cable to the PC with the screws on the
DB9 connector.
Note: If the PC does not have an RS-232 serial port, a USB Serial Converter will be needed.
You can contact MOONS’ to buy a USB to RS-232 converter.
The RS-232 circuitry does not have any extra electrical “hardening” and care should be taken
when connecting to the RS-232 port as hot plugging could result in circuit failure.
3.2.1 Node ID
Each node ID on a CANopen network must have a unique Node ID. The
Node ID is configured using a sixteen position switch to set the lower four
bits of the Node ID while the upper three bits are configured by using ST
Configurator. CANopen Node IDs are seven bits long, with a range of 1 -
127, or 0x01 - 0x7F in hexadecimal notation. Node ID 0x00 is reserved in
accordance with the DS301 specification.
3.2.2 Setting the Bitrate
The CANopen network bitrate is set by the ten position switch
on the front of the drive. The bit rate must be the same for all
nodes on the CANopen network. Any changes to the bit rate
require either a power cycle or a CANopen reset command to
take effect.
SW1 Bit Rate
0
1 Mbps
1
800 kbps
2
500 kbps
3
250 kbps
4
125 kbps
5
50 kbps
6
20 kbps
7
12.5 kbps
8
reserved
9
reserved
