| 摘要 |
<p>PURPOSE:To decrease the checking work of an alarm set value before a process control device operation by automatically operating an alarm set value with an alarm set value arithmetic part from a trigger signal inputted to an alarm setting instruction input part and an arithmetic auxiliary parameter. CONSTITUTION:The title device is provided with a process signal receiving part 2 to receive a process signal, an alarm deciding part 4 to output an alarm to an alarm output part 5 when a process signal received by the process signal receiving part 2 exceeds the alarm set value and an alarm setting instruction input part 1 to input an instruction to start the operation of the alarm set value. Further, an alarm set value arithmetic part 3, in which the operation is started by the instruction input inputted to the alarm setting instruction input and the arithmetic result is given to the alarm deciding part 4 as the alarm set value, is provided. Thus, the alarm set value arithmetic part 3 operates automatically the alarm set value from the instruction of the arithmetic starting inputted to an alarm setting instruction input part, the upper limit value and the lower limit value of the alarm set value and the process signal at this time. Thus, the alarm set value can be automatically given to the alarm deciding part 4 and the work can be decreased.</p> |
