User guide

P-i Publication 900-UM007C-EN-E - January 2011
Preface
Conventions Used in This
Manual
Meanings of Abbreviations
The following abbreviations are used in parameter names, figures, and in text
explanations. These abbreviations mean the following:
➊ A heater short indicates that the heater remains ON even when the control output from the Temperature
Controller is OFF because the SSR has failed or for any other reason.
➋ “EU” stands for Engineering Unit. EU is used as the minimum unit for engineering units such as °C, m, and g.
The size of EU varies according to the Input Type.
For example, when the input temperature setting range is –200…+1300°C, 1 EU is 1°C, and when the input
temperature setting range is –20.0…+500.0°C, 1 EU is 0.1°C.
For analog inputs, the size of EU varies according to the decimal point position of the scaling setting, and 1 EU
becomes the minimum scaling unit.
Note: For additional definitions of terms used in this manual, refer to
Appendix D, Glossary.
Table P.A
Symbol Term
PV Process value
SP Set point
SV Set value
AT Auto-tuning
ST Self-tuning
HB Heater Burnout
HS Heater Short ➊
EU Engineering unit ➋
OC Overcurrent
LBA Loop Burnout Alarm