---
name: "opto_ac5"
section: "9"
platform: "linux"
package: "linuxcnc-uspace"
version: "1:2.9.4-2+deb13u1"
release: "Debian 13 (Trixie)"
platforms: ["linux"]
url: "https://new.carta.tech/opto_ac5"
---

# opto\_ac5(9)

Realtime driver for opto22 PCI-AC5 cards

## NAME

opto\_ac5 - Realtime driver for opto22 PCI-AC5 cards

## SYNOPSIS

**loadrt opto\_ac5  \[portconfig0=0x***N***\] \[portconfig1=0x***N***\]**

## DESCRIPTION

**These pins and parameters are created by the realtime opto\_ac5** module. The portconfig0 and portconfig1 variables are used to configure the two ports of each card. The first 24 bits of a 32 bit number represent the 24 i/o points of each port. The lowest (rightmost) bit would be HAL pin 0 which is header connector pin 47. Then next bit to the left would be HAL pin 1, header connector pin 45 and so on, until bit 24 would be HAL pin 23, header connector pin 1. "1" bits represent output points. So channel 0..11 as inputs and 12..23 as outputs would be represented by (in binary) 111111111111000000000000 which is 0xfff000 in hexadecimal.  That is the number you would use, e.g., loadrt opto\_ac5 portconfig0=0xfff000

If no portconfig variable is specified the default configuration is 12 inputs then 12 outputs.

Up to 4 boards are supported.  Boards are numbered starting at 0.

Portnumber can be 0 or 1. Port 0 is closest to the card bracket.

## PINS

- **opto\_ac5.\[***BOARDNUMBER*\].**port\[***PORTNUMBER*\].**in-\[***PINNUMBER*\] OUT bit

  - **opto\_ac5.\[***BOARDNUMBER*\].**port\[***PORTNUMBER*\].**in-\[***PINNUMBER*\]-not OUT bit

  Connect a HAL bit signal to this pin to read an i/o point from the card. The PINNUMBER represents the position in the relay rack. E.g., PINNUMBER 0 is position 0 in a opto22 relay rack and would be pin 47 on the 50 pin header connector. The **-not** pin is inverted so that LOW gives TRUE and HIGH gives FALSE.

- **opto\_ac5.\[***BOARDNUMBER*\].**port\[***PORTNUMBER*\].**out-\[***PINNUMBER*\] IN bit

  Connect a HAL bit signal to this pin to write to an i/o point of the card. The PINNUMBER represents the position in the relay rack. E.g., PINNUMBER 23 is position 23 in a opto22 relay rack and would be pin 1 on the 50 pin header connector.

- **opto\_ac5.\[***BOARDNUMBER*\].**led\[***NUMBER*\] OUT bit

  Turns one of the on board LEDS on/off. LEDS are numbered 0 to 3.

## PARAMETERS

- **opto\_ac5.\[***BOARDNUMBER*\].**port\[***PORTNUMBER*\].**out-\[***PINNUMBER*\]-invert W bit

  When TRUE, invert the meaning of the corresponding **-out** pin so that TRUE gives LOW and FALSE gives HIGH.

## FUNCTIONS

- **opto\_ac5.0.digital-read**

  **Add this to a thread to read all the input points.**

- **opto\_ac5.0.digital-write**

  **Add this to a thread to write all the output points and LEDS.**

## BUGS

**All boards are loaded with the same port configurations  as the first board.**

## SEE ALSO

**http://wiki.linuxcnc.org/cgi-bin/wiki.pl?OptoPciAc5**