---
title: "PARCserver App Switches"
slug: "parcserver-app-switches"
updated: 2024-01-30T11:11:39Z
published: 2024-01-30T11:11:39Z
canonical: "kb.dataparc.com/parcserver-app-switches"
---

> ## Documentation Index
> Fetch the complete documentation index at: https://kb.dataparc.com/llms.txt
> Use this file to discover all available pages before exploring further.

# PARCserver App Switches

Some PARCserver applications can use switches to modify behavior.

PARCalarmServer: Add “-Site=SiteName” to have Alarm Server connect to a specific site.

HDAHealth: Add “–s” to start monitoring.

PortIO: Add “-writedatatopast=true” to let a CTCCalcs source write historical values.

PARChistory: When running multiple instances of PARChistory, use “-Site=SiteName.LocationName” to point the .exe at a site and location.