Description
The YOKOGAWA YS1700-000A34 is a programmable indicating controller from the YS1700 series. It is designed as a single-loop controller that can be customized through user programming for process control applications. The YS1700 combines control, indication, alarm handling, trend display, and communication functions in one panel-mounted instrument.
The model code -000A34 identifies the basic YS1700 configuration with 100 VAC / 24 VDC common power and Ethernet communication using Modbus/TCP. Yokogawa’s ordering guide confirms that /A34 is the Ethernet Modbus/TCP option and that it is available with the basic types -x0x and -x1x.
🔧 Key Features
• Programmable single-loop controller
• Color TFT LCD display
• User-programmable control functions
• Ethernet communication
• Modbus/TCP protocol
• Front-panel parameter operation
• Trend, bar, alarm, event, and meter displays
• Expandable I/O capability depending on configuration
• Suitable for replacement of older Yokogawa controllers
• Compact panel-mounted construction
📋 Product Datasheet
• Brand: YOKOGAWA
• Model: YS1700-000A34
• Product Series: YS1700
• Product Type: Programmable Indicating Controller
• Controller Type: Single-loop controller
• Basic Type: Basic configuration
• Power Supply: 100 VAC / 24 VDC common supply
• Communication: Ethernet
• Protocol: Modbus/TCP
• Communication Code: /A34
• Display: TFT LCD
• Programming: User-programmable
• Control Function: PID and programmable control functions, configuration dependent
• Mounting: Panel mounting
• Input Options: Direct input / transmitter input options, configuration dependent
• Output: Configuration dependent
• Dimensions: Approx. 144 × 72 × 100 mm*
• Weight: Approx. 0.7 kg*
• Country of Origin: Japan*
🏭 Typical Applications
The YS1700 is suitable for:
• Boiler control
• Steam pressure control
• Temperature control
• Flow control
• Level control
• Process heating systems
• Chemical processing
• Power generation
• Factory process automation
Yokogawa documents the YS1700 for applications including boiler control and replacement of older controllers, with Modbus TCP, Modbus RTU, and peer-to-peer communication available depending on configuration.
⚡ Functional Description
The controller can execute a user-defined control program rather than being limited to a fixed PID application. Its display supports multiple operating screens, including meter, trend, bar, alarm, and event displays. Parameters can be configured directly from the front panel.
For the YS1700-000A34, the /A34 option provides Ethernet communication using Modbus/TCP, making the controller suitable for connection to supervisory systems, PLCs, SCADA systems, and industrial Ethernet networks.
🔌 Installation & Configuration
• Verify the complete model code YS1700-000A34
• Confirm the required 100 VAC / 24 VDC supply
• Install the controller in the appropriate panel cutout
• Connect process input and output wiring
• Connect the Ethernet network
• Configure the controller application program
• Set the required Modbus/TCP communication parameters
• Verify input scaling and control output
• Check alarms and operating limits
• Perform loop testing before placing the process into service
🛠️ Commissioning Checklist
• Check power supply
• Confirm display startup
• Verify process input values
• Check output operation
• Confirm PID/control parameters
• Verify Ethernet link
• Test Modbus/TCP communication
• Check alarm functions
• Confirm trend and event displays
• Perform final loop response testing
⚠️ Replacement Note
The complete model code matters here. YS1700 ordering codes determine the controller type, power supply, input configuration, communication option, and certification. In particular, /A34 means Ethernet Modbus/TCP, while /A31 represents RS-485 communication. These options should not be treated as interchangeable.
📦 Ordering Information
YOKOGAWA YS1700-000A34 | Programmable Indicating Controller | Ethernet Communication | Modbus/TCP | 100 VAC / 24 VDC
