--- title: "MOV Not Read in SCADA: Micro-Webinar #03 | Citia" description: "Free Citia webinar on 21 Nov 2026, 14.00 WIB via Teams: troubleshoot MOVs that SCADA cannot read, from RS-485 and gateway to the field device." url: https://citia-engineering.com/en/webinars/micro-webinar-03-mov-scada-troubleshooting language: en updated: 2026-11-21 type: webinar site: Citia Engineering Indonesia --- # MOV not read in SCADA? Practical troubleshooting from gateway to field device Citia Micro-Webinar #03, Friday 21 November 2026 at 14.00 WIB on Microsoft Teams: a free 20-minute case study on MOVs that SCADA cannot read. | Field | Value | | --- | --- | | Date | 2026-11-21 | | Time | 14.00 WIB | | Speakers | Rofiqi Hidayat (Control System Engineer, PT Citia Engineering Indonesia) | | Status | Announced | [Registration](https://wa.me/628132206507) ## Topics covered - MOV case study: some devices read, some do not - Communication architecture: MOV, RS-485, gateway, SCADA - Troubleshooting steps: power, wiring, address, polling, command and feedback - Lessons learned and a diagnosis checklist In short A motor-operated valve (MOV) is a valve driven by an electric actuator, so the control room can open, close and stop it without sending someone to the pipe rack. The actuator also reports back: valve position, open or closed status, local or remote mode, thermal condition, torque and faults. That feedback reaches SCADA over a serial line, usually RS-485, through a gateway that polls each actuator by address. When only part of a group of MOVs appears in SCADA, the devices that do answer already prove that SCADA and part of the path are alive. The work is to find where the silent ones drop out. Micro-Webinar #03 takes that case and works along the path from the gateway to the field device. It is a short session, about 20 minutes, built around one field problem and the checklist that came out of it. For background before the session, Citia's MOV communication project at a fuel terminal in Jambi describes a path of the same shape, and the guides on Modbus RS-485 troubleshooting , Modbus and SCADA explain the protocol and the system around it. - Citia Micro-Webinar #03 runs online on Microsoft Teams on Friday 21 November 2026 at 14.00 WIB, for about 20 minutes, free of charge. - The case is a group of motor-operated valves (MOV) where some devices show up in SCADA and others do not. - The session follows the path MOV, RS-485, gateway, SCADA and checks power, wiring, address, polling, and command and feedback. - Rofiqi Hidayat, Control System Engineer at PT Citia Engineering Indonesia, presents. RSVP by replying HADIR to siTia on WhatsApp +62 813-2206-507. - 21 Nov 2026 Date Friday - 14.00 WIB Time About 20 minutes - Teams Platform Online via Microsoft Teams - Free Fee RSVP through siTia - MOV actuator: Reports position, open/close, local/remote, thermal, torque and fault. - RS-485 line: In the Jambi MOV project the line passes a surge protection device (SPD) first. - Gateway: Reads each MOV by device address, register, function code, baud rate and parity. - SCADA: Shows MOV data as tags and sends OPEN, CLOSE and STOP commands. ## The troubleshooting order - Power: Confirm the actuator and its communication electronics have supply before looking further. - Wiring: Follow the RS-485 pair from the gateway to the silent device: terminals, polarity and continuity. - Address: Each MOV on the line needs a unique address that matches the gateway configuration. - Polling: Check that the gateway actually polls the device with the right register, function code, baud rate and parity. - Command and feedback: Send a command from SCADA and read the MOV feedback back on SCADA to close the loop. ## Who will find it useful Engineers and technicians who maintain MOVs, RS-485 lines, gateways or SCADA at terminals and plants, and supervisors who need to know where a "not read" alarm comes from. Speaker: Rofiqi Hidayat, Control System Engineer, PT Citia Engineering Indonesia. - Series: Micro-Webinar #03 - Platform: Microsoft Teams - Fee: Free - RSVP: siTia on WhatsApp, reply HADIR ## Dates RSVP: reply HADIR to siTia: Send HADIR to siTia, the Citia virtual assistant on WhatsApp, at +62 813-2206-507. Prefer email? Use the "Remind me by email" button on this page to get a reminder before the session. - 13 Nov 2026: Session announced. RSVP opens through siTia on WhatsApp. - 21 Nov 2026, 14.00 WIB: Live on Microsoft Teams. About 20 minutes. - After the session: Page updated. This page will state whether material or a recording is published. ## Common questions Q: When is the MOV SCADA troubleshooting webinar? A: Friday 21 November 2026 at 14.00 WIB, online through Microsoft Teams, for about 20 minutes. Q: Is Citia Micro-Webinar #03 free, and how do I register? A: Yes, it is free. Reply HADIR to siTia on WhatsApp at +62 813-2206-507, or use the email reminder button on this page. Q: Why would some MOVs show in SCADA while others do not? A: Because the fault sits somewhere between the gateway and the silent devices, not in SCADA as a whole. The session checks power, wiring, address, polling, and command and feedback to find the point where those devices drop out. Q: What communication path does the session cover? A: MOV to RS-485 to gateway to SCADA. In Citia's Jambi MOV project the same path adds a surge protection device on the RS-485 side and a LAN arrester between the gateway and SCADA. Q: Will there be a recording? A: Citia has not announced one. After the session this page will say whether material or a recording is available. ## Sources and further reading 1. Motor-operated valve (MOV) communication, Citia (https://citia-engineering.com/en/projects/motor-operated-valve-mov-communication) 2. Jambi fuel terminal: replacement of ATG gateway (ECU) spare part, Citia (https://citia-engineering.com/en/projects/jambi-fuel-terminal-replacement-of-atg-gateway-ecu-spare-part) 3. MODBUS over Serial Line Specification and Implementation Guide V1.02, Modbus Organization, 2006-12-20 (https://www.modbus.org/file/secure/modbusoverserial.pdf) 4. The RS-485 Design Guide (SLLA272D), Texas Instruments, 2021-05 (https://www.ti.com/lit/an/slla272d/slla272d.pdf) 5. Limitorque actuators, Flowserve (https://www.flowserve.com/en/products/products-catalog/actuators/limitorque) Join Micro-Webinar #03: Reply HADIR to siTia on WhatsApp to reserve your place for Friday 21 November 2026 at 14.00 WIB. ## Contact - Company: PT Citia Engineering Indonesia - siTia - Virtual Assistance: [WhatsApp +62 813-2206-507](https://wa.me/628132206507). siTia answers questions about our products, projects and enquiries on WhatsApp. Replies are automated, and a person from the Citia team follows up. - Email: services@citiaengineering.com - Phone / WhatsApp (siTia): +62 813-2206-507 - Location: Bandung, Indonesia [Contact Citia](https://citia-engineering.com/en/contact.md) ## Structured data (JSON-LD) ```json { "@context": "https://schema.org", "@graph": [ { "@type": "Organization", "@id": "https://citia-engineering.com/#organization", "name": "Citia Engineering Indonesia", "legalName": "PT Citia Engineering Indonesia", "alternateName": "Citia", "url": "https://citia-engineering.com", "logo": { "@type": "ImageObject", "url": "https://citia-engineering.com/media/citia-logo.png", "width": 950, "height": 328 }, "description": "Citia is an engineering and system integration company in Bandung, Indonesia. 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