Senior Firmware Engineer （Cooling product）
Senior firmware engineer at Schneider Electric in Zhuhai developing control firmware for data center cooling equipment (air- and liquid-cooled: CRACs, chillers, CDUs) on PLC platforms (Modicon M172, Carel pCO5/C.PCO) with Harmony HMIs — writing control logic, debugging, testing, and implementing fieldbus protocols like Modbus, SNMP and CAN with cybersecurity compliance.
- Compensation
- Not disclosed
- Location
- 珠海市, 广东
- Work setup
- Not specified
- Seniority
- Senior
- Employment
- Not specified
- Experience
- Not specified
- Category
- Embedded
- Posted
Skills
Must have
- Excellent PLC programming skills in IEC 61131-3, especially structured text (ST) and function block diagram (FBD)
- Experience with standard industry PLCs (Schneider Modicon preferred)
- Experience with industry HMI/display development (Schneider Harmony HMI ET6/ST6 preferred)
- Familiar with control logic of market cooling products and key HVAC operation parameters
- Understand software/hardware architecture of temperature management solutions (liquid cooling, fresh air, compressors, condensers, evaporators, throttling devices)
- Experience with fieldbus communication such as Modbus RTU, Modbus TCP, SNMP, CAN
- Ability to read electrical diagrams
Full description
The firmware development will primarily be focused on data center infrastructure cooling equipment which includes both air-cooled and liquid-cooled options, such as computer room air conditioners, chillers, fan walls, condensers, liquid cooling CDU, and ancillary equipment. The hardware of control platforms primarily focuses on PLCs (Modicon M172 and Carel p CO5+ /or C.PCO), with HMI centered on Harmony HMI ET6/ST6 . Additionally, the hardware involved includes the device's external communication gateway, for which we need to develop various commonly used communication protocols on the market that comply with cybersecurity standards.
Essential functions:
· Evaluate cooling products control requirements and transfer to system control specification
· Work with cooling system engineer to complete the control logic, ability to draw control flow charts
· Be capable of completing the coding jobs individually
· Complete debug & qualification tests on both simulator and cooling unit level
· Build software test plan, support sample units build and online test
· Support to develop cooling unit manual control mode for lab test
· Support completing products documentation, such as operation manual, installation specification
· Support products improvements, such as upgrading cost and quality based on data from customer fields
· Support service team for field issues, visit customer field for products application or quality issues investigation
The candidate should meet the following requirements:
· Excellent PLC programming language (IEC 61131-3) skills, especially structure text (ST) and function block diagram (FBD)
· Experience in application of standard industry PLC (Schneider-electric MODICON is preferred)
· Experience in application and development for standard industry HMI/Display (Schneider-electric Harmony HMI ET6/or ST6 is preferred)
· Being familiar with the control logic of Cooling products in the current market and control characteristics, operation parameters of critical HVAC
· Understand the software/hardware architecture and logic of forward-looking temperature management solutions, including but not limited to liquid cooling, direct or indirect fresh air, temperature management, compressors, condensers, evaporators, and throttling devices
· Experience in application and development for field bus communication, such as Modbus RTU/Modbus TCP/SNMP/CAN
· Ability to read the electric diagram