Difference between revisions of "SimpleMotion V2 port"
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==Electrical properties== | ==Electrical properties== | ||
SimpleMotion V2 uses [[Wikipedia:RS485|RS485]] electrical serial communication standard for all data transfer. Some main benefits of using RS485 are: | SimpleMotion V2 uses [[Wikipedia:RS485|RS485]] electrical serial communication standard for all data transfer. Some main benefits of using RS485 are: | ||
| − | |||
| − | |||
* Multidrop buses possible (up to 32 devices in single serial link) | * Multidrop buses possible (up to 32 devices in single serial link) | ||
* High reliability due to differential signaling | * High reliability due to differential signaling | ||
* High data rates and long cable lengths possible | * High data rates and long cable lengths possible | ||
* Easy to interface even from smallest microcontrollers with [[Wikipedia:Universal_asynchronous_receiver/transmitter|UART]] | * Easy to interface even from smallest microcontrollers with [[Wikipedia:Universal_asynchronous_receiver/transmitter|UART]] | ||
| + | * Low wire count, only 2 signal wires + ground needed | ||
| + | * Bidirectional data transfer (receive & transmit) in one wire pair | ||
As default SimpleMotion V2 uses 460800 BPS bitrate. | As default SimpleMotion V2 uses 460800 BPS bitrate. | ||
| + | |||
==Use as E-stop input== | ==Use as E-stop input== | ||
[[File:multidrop_estop.png|thumb|SM V2 multidrop bus with E-stop functionality]]In Argon drive, the same connector acts also as emergencecy stop or [[Safe torque off]] input. User may connect a e-stop button directly at the end of device chain to gain reliable stopping mechanism for all linked devices. | [[File:multidrop_estop.png|thumb|SM V2 multidrop bus with E-stop functionality]]In Argon drive, the same connector acts also as emergencecy stop or [[Safe torque off]] input. User may connect a e-stop button directly at the end of device chain to gain reliable stopping mechanism for all linked devices. | ||
Revision as of 21:33, 13 December 2012
SimpleMotion V2 communication link and Argon drives use RJ45 connectors and cables as physical connection standard.
RJ45 is well known from Ethernet connectors and same cables may be used with SimpleMotion wiring.
Electrical properties
SimpleMotion V2 uses RS485 electrical serial communication standard for all data transfer. Some main benefits of using RS485 are:
- Multidrop buses possible (up to 32 devices in single serial link)
- High reliability due to differential signaling
- High data rates and long cable lengths possible
- Easy to interface even from smallest microcontrollers with UART
- Low wire count, only 2 signal wires + ground needed
- Bidirectional data transfer (receive & transmit) in one wire pair
As default SimpleMotion V2 uses 460800 BPS bitrate.
Use as E-stop input
In Argon drive, the same connector acts also as emergencecy stop or Safe torque off input. User may connect a e-stop button directly at the end of device chain to gain reliable stopping mechanism for all linked devices.
Connector pinout
| Pin # | Signal name | Description |
|---|---|---|
| 1 | CANL (reserved) | CAN bus possibility for future use |
| 2 | CANH (reserved) | CAN bus possibility for future use |
| 3 | RS485_A | RS485 signal A |
| 4 | Reserved | Do not connect |
| 5 | E_STOP | Connect normally closed E-stop button switch between pins 5 and 8 |
| 6 | RS485_B | RS485 signal B |
| 7 | Reserved | Do not connect |
| 8 | GND | Ground reference for RS485 and E_STOP |
