Eliwell EW971 - Page 8

MAX AND MIN TEMPERATURE ALARM
Relative Temperature
Value to setpoint (Att=1)
Absolute Temperature
Value (Att=0)
Temp. ≤ Set + LAL (only with LAL<0*)
Temp. ≥ Set + HAL (only with HAL>0**)
Temp. ≥ Set + LAL + AFd o
≥ Set - ILALI + AFd (LAL < 0*)
Temp. ≤ Set + HAL - AFd (HAL > 0**)
Temp. ≤ LAL (LAL with sign)
Temp. ≥ HAL (HAL with sign)
Temp. ≥ LAL + AFd
Temp. ≤ HAL - AFd
Minimum temperature
alarm
Maximum temperature
alarm
Returning from
minimum temp. alarm
Returning from
maximum temp. alarm
* if LAL is negative, Set + LAL < Set
** if HAL is negative, Set + HAL < Set
Setpoint - LAL
AFd
Off
Setpoint + HAL
AFd
Setpoint - LAL + AFd
Setpoint + HAL - AFd
Setpoint
LAL
AFd
HAL
AFd
LAL + AFd
HAL - AFd