bentrup TC507 - Page 20

20
03: power % on ERR
(value range -100 to 100)
Predefined process output if an error occurs in the control channel. The control channel enters error state if a.)
the process value fails (overrun, underrun, invalid), b.) the process value exceeds the process value limit
specified in the channel configuration or c.) the gradient check indicates failure
04: maximum value
(value range 0 to 9999)
Maximum process value. Used to limit the process input value for safety reasons as well as setting the
operation range. If the process value exceeds the limit the control channel enters error state which can only be
cleared by re-starting the programme. Set this value above the actual operation range to allow overshooting
05: grdnt check s
(value range 0 to 3600)
The gradient check is used for safety reasons. Prevents the unit from damage if the feedback signal (e.g. the
thermocouple) fails. Checking the increase of the process value is performed on maximum output (typically
+100%). This parameter defines the checking period in seconds. Set to "0" to disable checking. If the gradient
check determines an error the channel is switched off (gradient error state)
06: grdnt chk dif
(value range 0 to 9999)
Increase of the process value required per checking period on maximum heating
07: ctrl charact
(value range 0 to 3)
Depending on the application select the operation range of the control channel to one of the following options:
0 = 0% to 100% / 1 = 100% to 0% / 2 = -100% to +100% / 3 = +100% to -100%
following parameters apply on selection PID only:
08: prop. band %
(value range 0.0 to 999.9)
Control parameter "proportional band" in % of the maximum value
09: integral time
(value range 0 to 9999)
Control parameter "integral time" in seconds
10: derivat. time
(value range 0 to 9999)
Control parameter "derivative time" in seconds
11: prop. shift
(value range 0 to 4)
Determines the operating range of the proportional band: 0 = prop. band below setpoint / 1 = prop. band one
quarter above setpoint / 2 = .. half above setpoint / 3 = .. three quarters above setpoint. In most applications a
setting of "1" ensures best results (ie. fast reaching the setpoint with minimum overshoot)
following parameters apply on selection C-PID only:
18: prop. band %
(value range 0.0 to 999.9)
Control parameter "proportional band" in % of the maximum value
19: integral time
(value range 0 to 9999)
Control parameter "integral time" in seconds
20: derivat. time
(value range 0 to 9999)
Control parameter "derivative time" in seconds
21: prop. shift
(value range 0 to 4)
Determines the operating range of the proportional band: 0 = prop. band below setpoint / 1 = prop. band one
quarter above setpoint / 2 = .. half above setpoint / 3 = .. three quarters above setpoint. In most applications a
setting of "1" ensures best results (ie. fast reaching the setpoint with minimum overshoot)
22: + activat. DOx
(value range OFF, DO0.0 to DO1.0)
Selects the bit (digital output) which activates the positive operation range (heating). When the bit is off the