US1000 {Enhanced functions} Automation Controllers

Dual Loop Controllers (72×144×100 mm) (Displays 2 loops simultaneously via bargraphs)


  • Fast and accurate Tracks fast-changing signals at ±0.1% accuracy and at up to 50ms input sampling period.
  • Sharp and Large 5-digits LED display with 11 x 20 mm digits
  • 13 standard UT control modes, including single-loop, cascade, and dual-loop control.
  • Input Accuracy:±1% , control cycle 50 ms
  • Standard input and output contacts
    • — 7 Contact inputs
    • — 7 Contact outputs
    • Expandable up to 23 inputs and 23 outputs by connecting I/O expansion modules
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  • Simple operation:
    • Easy to understand hardcopy format and handy CD-ROM user’s manuals.
    • Easy parameter setting on a PC screen, enabling data to be transmitted through the front panel using an optical communication adapter.
  • Customized computing
    • 4 arithmetic operations, as well as logical
    • Pressure compensation
    • Switched-PV computations functions (LL200 PC-based Custom Computation Building Tool)
  • Communications
    • Modbus
    • PC-Link & Ladder protocols and coordinated operation.


  • Temperature control
  • Cascade applications
  • Dual loop control
  • CP computation control


The US1000 Digital Indicating Controller has bright LED bar displays, as well as 5 digit displays. A variety of advanced control and custom computation functions can be accessed via front panel. Operations and configurations can either be carried out by using the front panel or PC. The US1000 displays PV, SV, and MV, and a wealth of control and computation functions further enhanced by LL1200, PC-based building software tool for parameter and custom setup. Communication functions such as Modbus protocol allow the US1000 to communicate with the other product models.

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The US1000 conforms to IP65 allowing it to be used in limited ingress environments. Ideal for temperature control applications (heating and cooling applications via cascade loops) , water waste and flow compensation, combustion control and more.

Ideal controllers for Heating and cooling applications , Combustion control, Temperature and humidity control, Water waster applications that require high control accuracy.

  • Literature
  • Specifications
  • Accessories
Model: Yokogawa US1000 indicating controllers
PV/SP Data display: 5 digits (11 segments)/ 5 digits (7 segments) with Bargraph display
Data display range: -19999 to 30000
Bargraph Display: 2 – 30-segment LED displays (0-100 marking)
PV inputs: 2 universal inputs (TCs, RTDs, mV, V)
Control loops: 1 or 2(cascade, dual)
Control Algorithms: ON/OFF, PID (Continuous, Time-proportional), Heating/Cooling, Position-proportional
Number of Setpoint (SP): 8
Control Computation: PID , Auto-tuning, "SUPER" (An overshoot suppressing) function,Single-loop control, Cascade control, Dual-loop control
Operation Mode switching: AUTO/MANUAL, RUN/STOP, CASCADE, ON/OFF
Parameter Setting Range: Proportional band, Integral time, Derivative time, ON/OFF control hysteresis, Output limiter, Rate of change limiter for output
Control Outputs (MV) Select from 2 sets of Relays, Voltage Pulses or 4 to 20mA
Auxiliary Analog Output (4 to 20mA) 1 point, 2 points
Digital Outputs 3 or 7
Digital Inputs
Number: 2 or 7
Loop power supply
Number: 1 point
Type: 15V ( Cannot use with auxiliary analog output )
Number: 1
Front Protection: IP65
Power supply: Rated voltage 100 to 240V AC, (±10%), 50/60Hz
Power consumption: Max 25 VA (11.0 W) at maximum
General Approvals UL, CE, CSA, FM
Operating Temperature: 0 to 50°C ( 40°C or less in close mounting side-by-side)
Relative Humidity: 5 to 90% RH (no condensation)
Storage Temperature: -25 to 70°C
Dimensions: 72(W)×144(H)×100(D) (mm)
Mounting: Direct panel mounting; mounting bracket, one each for upper and lower mounting
Weight: 1kg

PC-based Setup Parameters & Custom Computation Building Tools

For US1000 Series Controllers
LL1200PC-Based Computation Tool

The LL1200 PC-Based Custom Computation Building Tool is a software package used to create custom computation and custom display functions for the US1000 Digital Indicating Controller. This tool also covers the functions of the LL1100 PC-Based Parameters Setting Tool. The custom computation building function, the main function of this package, enables users to formulate computations graphically. This tool has an online help function that provides operational guidance and explanations of the computation modules.

  • Computations
  • Setting parameters and Computations
  • Saving and reading the parameters and computations stored on the storage media
  • Printing out parameters and computations
LL200 connection image

Computation Functions

[Arithmetic computations] Addition, subtraction, multiplication, division, absolute value, reciprocal, auto-selector (min./max./average/ difference), hold maximum value, hold minimum value, hold, switch, limiter, constant, and multi-selector.

[Logic operations] AND, OR, exclusive OR, NOT, latch, greater, lesser, decremental counter, counter, equal-to, not-equal-to, range, delay, AND (long word), OR (long word), word shift, and edge-triggered counter.

[Special computations] Sum, timer, rate-of-change limiter, 10-segment linearizer 1 and 2, inverse 10-segment linearizer 1 and 2, curve linearizer 1 and 2, ratio, first-order-lag filter, EU-range conversion, switching between two inputs, temperature and humidity calculation, square-root extraction, detection of change, loop-1 output selection 1, loop-1 output selection 11, loop-1 output selection 12, loop-1 output selection 13, loop-2 output selection 2, loop-2 output selection 21, fluid temperature compensation, fluid pressure compensation, 10-segment linearizer 3 and 4, dead time, moving average, edgetriggered timer, Detection of Change at Edge, squareroot extraction 2, and flow sum.

[Special functions] Display data unit conversion, parameter setting, data display 1, data display 2, output-1 terminal configuration, and output-2 terminal configuration

Custom Display Function:

The function builds the US1000 controller’s custom displays, according to the user-defined display function created, by configuring display elements and display sequences. Users can select operation displays from the display types provided, and set a display sequence and conditions for them.

Monitor Function:

Users can monitor and confirm the behavior of the created custom computation by setting simulated input signals from a personal computer screen

Communication Function:

When the US1000 controller operation is stopped, users can download the created custom computation data to the US1000 and upload custom computation data from the US1000. It is also possible to compare the custom computation data created using this tool with those in the US1000 controller.

File Management Function:

This function allows users to save the custom computation data created with this tool as well as the data uploaded from the US1000 controller onto the hard disk of a personal computer or a floppy disk. It is also possible to compare the custom computation data created with those in the custom computation data files created in the past.


Tuning Functions

Parameters Setting Function:

Sets and changes the control parameters of the US1000 such as the controller mode (US mode), universal input/output selection, setup parameters, and operation parameters.

Tuning Function:

This function is used to tune the PID parameters of the US1000 controller. The PID parameters can be tuned and auto-tuning function executed while the PV, SV, and MV trend graphs are being displayed on a personal computer screen.

Downloading, Uploading, and Comparing Parameters

When the US1000 controller operation is stopped, users can download the created parameter data from the controller and upload parameter data to the controller. It is also possible to compare the parameter data created using this tool with the data in the US1000 controller.

File Management Function:

This function allows users to save the parameter data created with this tool as well as data uploaded from the US1000 controller onto the hard disk of a personal computer or a floppy disk. It is also possible to compare the parameter data created with those in parameter files created in the past.