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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:
Note: (1) A heater short indicates that the heater remains ON even when the control output from the Digital
Controller is OFF because the SSR has failed or for any other reason.
(2) “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 –20.0 to +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.
Symbol Term
PV Process value
SP Set point
SV Set value
AT Au to-tu n ing
HB Heater burnout
HS Heater short (See note 1.)
OC Heater overcurrent
LBA Loop burnout alarm
EU Engineering unit (See note 2.)
RSP Remote SP
FSP
Fixed SP
PSP Program SP
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