# \#modbus **URL:** https://forumautomation.com/tag/modbus/24.md [Latest](https://forumautomation.com/latest.md) · [Categories](https://forumautomation.com/categories.md) · [Tags](https://forumautomation.com/tags.md) --- ## [Free Modbus Simulator](https://forumautomation.com/t/free-modbus-simulator/12873)
**Author:** [@Rabert](https://forumautomation.com/u/Rabert)\ **Replies:** 0\ **Last updated:** [December 1, 2024, 6:08am UTC](https://forumautomation.com/t/free-modbus-simulator/12873 "2024-12-01T06:08:44Z")
The ScanBus-BR is here! It is perfect for testing & development because it provides: Adaptability: It can function as either a master or a client in both Modbus RTU & TCP. Portability: It can be used on any computer… --- ## [Automatic phone call, sms or email when a Modbus TCP register is changing state?](https://forumautomation.com/t/automatic-phone-call-sms-or-email-when-a-modbus-tcp-register-is-changing-state/8226)
**Author:** [@brophy](https://forumautomation.com/u/brophy)\ **Replies:** 0\ **Last updated:** [May 1, 2020, 11:30pm UTC](https://forumautomation.com/t/automatic-phone-call-sms-or-email-when-a-modbus-tcp-register-is-changing-state/8226 "2020-05-01T23:30:00Z")
Last year I developed an android alarm system which called, send SMS or email automatically whenever an ONVIF camera detect motion. Last month I read about modbus TCP old technology. So I put that into my code so that a… --- ## [How to do proper port settings/configuration of Rs 485 modbus?](https://forumautomation.com/t/how-to-do-proper-port-settings-configuration-of-rs-485-modbus/1607)
**Author:** [@denizen](https://forumautomation.com/u/denizen)\ **Replies:** 5\ **Last updated:** [August 19, 2021, 12:36pm UTC](https://forumautomation.com/t/how-to-do-proper-port-settings-configuration-of-rs-485-modbus/1607 "2021-08-19T12:36:08Z")
Every RS 485 port on a device has a configuration associated with it and these configuration parameter must be set using the programming software for the particular device. First thing to consider is device id.Device id… --- ## [FREE Modbus Scanner App - From Chipkin Automation Systems Inc](https://forumautomation.com/t/free-modbus-scanner-app-from-chipkin-automation-systems-inc/7197)
**Author:** [@ChipkinAutomation](https://forumautomation.com/u/ChipkinAutomation)\ **Replies:** 0\ **Last updated:** [September 25, 2019, 2:40pm UTC](https://forumautomation.com/t/free-modbus-scanner-app-from-chipkin-automation-systems-inc/7197 "2019-09-25T14:40:26Z")
Search “CAS Modbus Scanner” in the Google Play Store & Apple Store Also, we are excited to announce this as a White-Label Modbus Scanner App! We are offering a brand building exercise that strengthens connections and co… --- ## [PLC as Modbus Master with 6 HMIs as Modbus slave on Rs485](https://forumautomation.com/t/plc-as-modbus-master-with-6-hmis-as-modbus-slave-on-rs485/7131)
**Author:** [@Vilas](https://forumautomation.com/u/Vilas)\ **Replies:** 0\ **Last updated:** [September 17, 2019, 4:58am UTC](https://forumautomation.com/t/plc-as-modbus-master-with-6-hmis-as-modbus-slave-on-rs485/7131 "2019-09-17T04:58:22Z")
Hello friends, I am having a PLC as a Modbus master on serial 485 connected to 6 HMIs as slaves. I read from and write into the HMIs registers by the PLC. The application is for a passenger elevator with Ground + 4 floo… --- ## [Modbus Test Utility - Free alternative to Modscan / Modbus Poll / Simply Modbus](https://forumautomation.com/t/modbus-test-utility-free-alternative-to-modscan-modbus-poll-simply-modbus/2828)
**Author:** [@denizen](https://forumautomation.com/u/denizen)\ **Replies:** 1\ **Last updated:** [June 15, 2018, 6:42pm UTC](https://forumautomation.com/t/modbus-test-utility-free-alternative-to-modscan-modbus-poll-simply-modbus/2828 "2018-06-15T18:42:37Z")
Modbus Test Tool / Modbus Master Simulator Modbus test utilities are used to diagnose Modbus communication and verifying the data in specific address. The utility is used for testing Modbus slave device. What a Modbus T… --- ## [How to identify the Modbus master & slave?](https://forumautomation.com/t/how-to-identify-the-modbus-master-slave/2952)
**Author:** [@Maissa\_Gasmi](https://forumautomation.com/u/Maissa_Gasmi)\ **Replies:** 2\ **Last updated:** [January 13, 2018, 6:43pm UTC](https://forumautomation.com/t/how-to-identify-the-modbus-master-slave/2952 "2018-01-13T18:43:46Z")
Hi all, I’m using in my current project an RTU composed of a pair of redundant CPUs (a master and a standby) that I need to connect to a panel view via a MODBUS RTU protocol (using RS232). My question is: who would be th… --- ## [EMI effect on modbus communication casuses failure of system](https://forumautomation.com/t/emi-effect-on-modbus-communication-casuses-failure-of-system/1833)
**Author:** [@Nikhil\_N](https://forumautomation.com/u/Nikhil_N)\ **Replies:** 1\ **Last updated:** [March 16, 2017, 11:14pm UTC](https://forumautomation.com/t/emi-effect-on-modbus-communication-casuses-failure-of-system/1833 "2017-03-16T23:14:55Z")
I have a compressor and PC communicating in modbus. The distance between master and slave is about 1000ft. I want to analyze the effect of interference on the communication. In actual field we are facing some issues due … --- ## [What is the difference between Modbus and RS 485?](https://forumautomation.com/t/what-is-the-difference-between-modbus-and-rs-485/1609)
**Author:** [@denizen](https://forumautomation.com/u/denizen)\ **Replies:** 0\ **Last updated:** [December 31, 2016, 5:35am UTC](https://forumautomation.com/t/what-is-the-difference-between-modbus-and-rs-485/1609 "2016-12-31T05:35:40Z")
What is Modbus ? Modbus is a protocol. Modbus protocols defines the messaging structure that is used to exchange data. Modbus can use many different types of electrical standard and to tied to RS 485. Modbus communicat…