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The Add-on requires Modbus comtabile compatilbe service check plugins or Add-ons as it only provides the basic interface to the Bus. |
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- check_modbus_fast_access-m2m
- check_modbus_fast_access-automationcheck_modbus_fast_drycontact3
1.4.1 Typical use cases
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The daemon queues the checks, there is no need for low check intervals and retries as each value change will be reported to the monitor process immediately. Use a service check configuration as described below to save system performance and to avoid unnecessarily scheduled checks.
Normal check frequency (minutes): 25
Check attempts: 1
Retry check frequency: 25
Execute active checks: Yes
Execute passive checks: Yes
Freshness checking: No
- MODBUS Plugin Overview
2.1 modbus-fastd-COM1/COM2
Daemons for either the COM1 or COM2 portthe COM ports. Make sure you install these first!
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Time Plan: Daemon Queue, Immediate Alarms
2.5 5 check_modbus_fastaccess_acessm2m-m2mwtsc
Topic(s): Access control monitoring with “M2M-WTSC-RS485” converter devices and Wiegand Keypads.
Time Plan: Daemon Queue, Immediate Alarms
2.6 check_modbus_fast_access-automation
Topic(s): Access control monitoring with “Automation Converter” devices and Wiegand Keypads.
Time Plan: Daemon Queue, Immediate Alarms
- MODBUS-Setup Extension
With generation three checks, a new extension was introduced, the MODBUS-Setup Addon. This is intended to ease the basic setup of MODBUS based devices. It features a set of pre-defined commands that can be executed from the administrative Web-GUI. Therefore no manually configured check_modbus_write-service checks are no longer required.
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- Heavy CPU usage
- High System Load
- Slow Web Interface
- Slow SONARMANAGER Status Download, Configuration Up/Download
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I am receiving “Reply Time-Out” in MODBUS-Setup
Make sure you don’t mix old generation MODBUS plug-ins and generation 3 plug-ins. These use different daemons and will fail when used together. Especially “check_modbus_access” should not be used in combination with newer plug-ins.
I tried to write a new register value to a T3-8I13O but the value does not change.
Cycle the device and try again.
Installation
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The add-on itself is nearly configuration-free as all parametrization is done within the related Modbus extensions. Only some system parameters should be considered for fine tuning. Please reference to Modbus Monitoring - Best Practices and Performance Insights in order to have an overview of the main configuring parameters and their influence in the system.
Service Reaper Frequency
This setting defines how often the Monitor Process is harvesting the gathered results form the daemon. The lower the setting the more often results are harvested but this can other hand lead to higher system loads.
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- Choose RECONFIGURE_DELAY from the Command drop-down
- Adjust the value and save it by choosing Submit
Troubleshooting
I do not see all the modbus configured services in the MODBUS-Setup tool
Restart the daemon for the port you are testing in the MODBUS-Setup tool
I am receiving “Reply Time-Out” in MODBUS-Setup
Make sure you don’t mix old generation MODBUS plug-ins and generation 3 plug-ins. These use different daemons and will fail when used together. Especially “check_modbus_access” should not be used in combination with newer plug-ins.
I tried to write a new register value to a T3-8I13O but the value does not change.
Cycle the device and try again.
Modbus is a complex topic that normally needs trained personnel to deal with. Please contact support@azeti.com in case you need help configuring your devices.