---
name: "updown"
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/updown"
---

# updown(9)

Counts up or down, with optional limits and wraparound behavior

## NAME

updown - Counts up or down, with optional limits and wraparound behavior

## SYNOPSIS

**loadrt updown \[count=*N*\|names=*name1*\[,*name2...*\]\]**

## FUNCTIONS

- **updown.***N*

  Process inputs and update count if necessary

## PINS

- **updown.*N*.countup bit in**

  Increment count when this pin goes from 0 to 1

- **updown.*N*.countdown bit in**

  Decrement count when this pin goes from 0 to 1

- **updown.*N*.reset bit in**

  Reset count when this pin goes from 0 to 1

- **updown.*N*.count s32 out**

  The current count

## PARAMETERS

- **updown.*N*.clamp bit rw**

  If TRUE, then clamp the output to the min and max parameters.

- **updown.*N*.wrap bit rw**

  If TRUE, then wrap around when the count goes above or below the min and max parameters.  Note that wrap implies (and overrides) clamp.

- **updown.*N*.max s32 rw (default: *0x7FFFFFFF*)**

  If clamp or wrap is set, count will never exceed this number

- **updown.*N*.min s32 rw**

  If clamp or wrap is set, count will never be less than this number

## AUTHOR

Stephen Wille Padnos

## LICENSE

GPL