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Control Function |
| Self-tuning (STC) |
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| Simplifies tuning when starting up or changing the process unit under control. |
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| Setpoint filter (SVF) |
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| Can optimize tracking with changes in set-points. Also can maintain optimum responsiveness to disturbances. |
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| Flexible DI/DO |
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| The YS1700/YS1500fs six DI/DO terminals can be used for both input and output. |
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| Programmable function key |
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| With a user program, the program function key (PF key) on the instrumentfs front panel can be used as an ON/OFF switch for self-tuning, or as a Start button for sequence operation. |
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YS1500 control functions |
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Control Mode |
| Single-Loop |
Cascade |
Autoselector |
| Loop 1 |
Loop 2 |
Loop 1 |
Loop 2 |
| Standard PID control |
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| Proportional (PD) control |
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| Sample-and-hold PI control |
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| Adjustable setpoint filter (SVF) |
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| Self-tuning function (STC) |
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*1 |
*2 |
| Feedforward control |
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| Output tracking |
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| Preset output |
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| Output limiter |
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| PH, PL, HH, LL, DV and VL alarm |
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*1: Functions on primary loop when closed loop, secondary loop when open loop.
*2: Functions on unselected loop. |
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Programmable Mode |
Preset Function Mode |
| BSC1 |
BSC2 |
CSC |
SSC |
Single-
Loop |
Cascade |
Autoselector |
| CNT1 |
CNT2 |
CNT1 |
CNT2 |
CNT1 |
CNT2 |
CNT1 |
CNT2 |
| Standard PID control |
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| Proportional (PD) control |
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| Sample-and-hold PI control |
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| Batch PID control |
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| Feedforward control |
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| Output tracking |
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| Preset output |
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| Output limiter |
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| Adjustable setpoint filter (SVF) |
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| Self-tuning function (STC) |
*3 |
*1 |
*2 |
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*2 |
| PH, PL, HH, LL, DV and VL alarm |
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*1: Functions on primary loop when closed loop, secondary loop when open loop.
*2: Functions on unselected loop.
*3: Either BSC1 or BSC2. |
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| E |
Computation and control functions are built into the controller as a computational function library. |
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One type of BSC, CSC or SSC in used for one controller at a time. However, both BSC1 and BSC2 can be used at the same time. |
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Operation is the same as the YS150 in the preset function mode. |
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Control period in the programmable mode is to be selected from 50 ms,100 ms and 200 ms. |
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Independent control of two loops is possible in the programmable mode. |
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