Eurotherm Drives 590 DRV Digital, Product Manual

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Appendix C Setup Parameters
590 DRV Digital DC Drive Product Manual App. C - 32
C
DIGITAL DC DRIVE
MENU LEVEL
MENU LEVEL
DIAGNOSTICS
MENU LEVEL
SETUP PARAMETERS
SETUP PARAMETERS
RAMPS
SETUP PARAMETERS
SETPOINT SUM 1
SETUP PARAMETERS
STANDSTILL
SETUP PARAMETERS
SPEED LOOP
SPEED LOOP
ADVANCED
ADVANCED
SPEED LOOP
PROP. GAIN
ADVANCED
ADAPTION
ZERO SPD. QUENCH
M
M
M
M
SPEED LOOP::ADVANCED
ADVANCED has two sub-menus, ADAPTION and ZERO SPD. QUENCH.
ADAPTION changes the proportional and integral profiles. ZERO SPD. QUENCH
disables SCR firing when the drive is stopped.
Inputs and Outputs
ADVANCED has one input, RAMPING from RAMPS.
Inputs for ADAPTION are PROP. GAIN and INT. TIME CONST. from the speed
loop. Its outputs are profiled proportional and integral gains for the speed loop.
Inputs for ZERO SPD. QUENCH are SPEED DEMAND, SPEED FEEDBACK, and
CURRENT DEMAND. The output is a signal for disabling the armature SCR firing.
Description
I GAIN IN RAMP scales the integral gain when the drive is ramping. When RAMP-
ING is TRUE, the integral gain from ADAPTION is switched through the I GAIN IN
RAMP scaler. This can be used to prevent integral windup caused by very high
inertia loads during ramping.
ADAPTION
ADAPTION allows you to profile the drive's speed loop proportional and integral
gains to certain drive parameters. The gains change when the motor speed feedback
reaches the thresholds determined by SPD BRK1 (LOW) and SPD BRK2 (HIGH).
At or below SPD BRK1 (LOW), the speed loop uses the PROP. GAIN and INT.
TIME CONST. values set in ADAPTION as its PI loop gains. Between SPD BRK1
(LOW) and SPD BRK2 (HIGH), profiling occurs and the speed loop gains are determined
by another parameter value according to the MODE selection. Above SPD BRK2
(HIGH) the PROP. GAIN and INT. TIME CONST. settings in SPEED LOOP are used.
MODE selects the parameter for profiling the speed loop PI gains when the motor speed is between the two speed
breakpoints. Mode 0 (the default) disables the profiling so that the speed loop uses PROP. GAIN and INT. TIME
CONST. in SPEED LOOP as its PI loop gain settings, regardless of motor speed. Mode 1 uses SPEED FEEDBACK
as the gain profiling source; mode 2 uses SPEED ERROR; and mode 3 uses CURRENT DEMAND.
ZERO SPD. QUENCH
ZERO SPD. QUENCH, when TRUE, disables the current loop when SPEED DEMAND, SPEED FEEDBACK, and
CURRENT DEMAND have all dropped to the threshold levels set by ZERO SPD. LEVEL and ZERO IAD LEVEL. The
speed loop remains enabled and the contactor stays energized. This permits the current loop to be enabled very quickly.
Parameters
Tag Parameter Description Range Default
274 I GAIN IN RAMP Scales the integral gain during ramping. 0.0 to 2.0000 1.0000
ADAPTION
268 MODE Selects the speed breakpoint input signal. 0 to 3 0
269 SPD BRK1 (LOW) Speed breakpoint 1 to start gain profiling. 0.00 to 100.00% 1.00%
270 SPD BRK2 (HIGH) Speed breakpoint 2 to stop gain profiling. 0.00 to 100.00% 5.00%
271 PROP. GAIN Proportional gain used below SPD BRK1 (LOW). 0.00 to 200.00 5.00
272 INT. TIME CONST. Integral time constant used below SPD BRK1 (LOW). 0.001 to 30.000 Secs 0.500 Secs
ZERO SPD. QUENCH
284 ZERO SPD. LEVEL SPEED DEMAND and SPEED FEEDBACK thresholds for 0.00 to 200.00% 0.50%
disabling the current loop.
285 ZERO IAD LEVEL Current demand threshold for disabling the 0.00 to 200.00% 1.50%
current loop.