Citia Micro-Webinar
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.
- Date
- 21 November 2026
- Time
- 14.00 WIB
- Speakers
- Rofiqi Hidayat (Control System Engineer, PT Citia Engineering Indonesia)
- Status
- Announced
- Topics
- 4
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Topics
What the session covers
- 01
MOV case study: some devices read, some do not
- 02
Communication architecture: MOV, RS-485, gateway, SCADA
- 03
Troubleshooting steps: power, wiring, address, polling, command and feedback
- 04
Lessons learned and a diagnosis checklist
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.
- 21 Nov 2026DateFriday
- 14.00 WIBTimeAbout 20 minutes
- TeamsPlatformOnline via Microsoft Teams
- FreeFeeRSVP through siTia
Reports position, open/close, local/remote, thermal, torque and fault.
Hover, focus or tap a step to read its note.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
- 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
When is the MOV SCADA troubleshooting webinar?
Friday 21 November 2026 at 14.00 WIB, online through Microsoft Teams, for about 20 minutes.
Is Citia Micro-Webinar #03 free, and how do I register?
Yes, it is free. Reply HADIR to siTia on WhatsApp at +62 813-2206-507, or use the email reminder button on this page.
Why would some MOVs show in SCADA while others do not?
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.
What communication path does the session cover?
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.
Will there be a recording?
Citia has not announced one. After the session this page will say whether material or a recording is available.
Sources and further reading
- Motor-operated valve (MOV) communication (opens in a new tab)
- Jambi fuel terminal: replacement of ATG gateway (ECU) spare part (opens in a new tab)
- MODBUS over Serial Line Specification and Implementation Guide V1.02 (opens in a new tab)
- The RS-485 Design Guide (SLLA272D) (opens in a new tab)
- Limitorque actuators (opens in a new tab)
Related products and solutions
- ProjectMotor-operated valve (MOV) communicationRestoration of Flowserve Limitorque MOV communication to InduSoft SCADA at Fuel Terminal Jambi, through RS-485, an SPD, an ECU-1051 gateway and a LAN arrester.
- KnowledgeTroubleshooting Modbus RS-485 communicationMost Modbus RS-485 faults start at the physical layer. A field checklist for termination, biasing, topology, grounding, serial settings and exception codes.
- KnowledgeWhat is Modbus? RTU vs TCP, registers and function codesModbus is an open protocol for industrial devices. This guide compares Modbus RTU and TCP and explains registers, function codes, frames and gateways.
- KnowledgeWhat is SCADA? Components, architecture and industrial examplesSCADA collects data from PLCs, RTUs and instruments, shows it to operators and sends supervisory commands. Components, architecture and real plant examples.
- ProjectJambi fuel terminal: replacement of ATG gateway (ECU) spare partThis project replaced the spare part Gateway ATG ECU-1051 Advantech at the Jambi fuel terminal to restore data communication between the Automatic Tank Gauging (ATG) and the Tank Management System (TMS) application.
- WebinarAlways-On Terminal: high availability for OT servers in a terminal automation systemCitia Micro-Webinar #02, held online on 6 November 2026, covered triple-layer auto failover for TAS OT servers: server, network and database.