Eurotherm 590SP, Product Manual

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Appendix C Setup Parameters
590 DRV Digital DC Drive Product Manual App. C - 20
C
SETPOINT SUM 1
SETPOINT SUM 1 allows the summing and scaling of three analog inputs to produce
SPT. SUM OUTPUT.
Note: This block is ignored by the drive unless SYSTEM::
CONFIGURE I/O:: BLOCK DIAGRAM:: SPT SUM 1 DEST is
connected to a nonzero tag. The default connection is to tag 289.
Inputs and Outputs
ANALOG I/P 1, terminal A2, is the default input. The default output, SPT. SUM
OUTPUT, connects to SETPOINT 1 in the speed loop.
590SP DC DRIVE
MENU LEVEL
MENU LEVEL
DIAGNOSTICS
MENU LEVEL
SETUP PARAMETERS
SETUP PARAMETERS
RAMPS
SETUP PARAMETERS
SETPOINT SUM 1
M
M
Description
INPUT 0 and INPUT 1 have individual ratio and divider scalers, and signs. INPUT 1 has an additional deadband
function set by DEADBAND WIDTH. When the input is within the deadband, the output clamps to zero to ignore any
noise. This parameter is useful when digital setpoints are used (for example from a 5703, serial communications, or
the RAISE LOWER function block). The inputs have symmetrical limits set by LIMIT. INPUT 2 has no scaling or
limits.
The output after INPUT 0, INPUT 1, and INPUT 2 are summed is also clamped by LIMIT before producing SPT.
SUM OUTPUT.
Parameters
Tag Parameter Description Range Default
6 RATIO 1 Multiplicative scaling for INPUT 1. ±3.0000 1.0000
208 RATIO 0 Multiplicative scaling for INPUT 0. ±3.0000 1.0000
8 SIGN 1 Polarity for INPUT 1. POSITIVE/NEGATIVE POSITIVE
292 SIGN 0 Polarity for INPUT 0. POSITIVE/NEGATIVE POSITIVE
419 DIVIDER 1 Divider scaling for INPUT 1. ±3.0000 1.0000
420 DIVIDER 0 Divider scaling for INPUT 0. ±3.0000 1.0000
131 DEADBAND WIDTH Range within which the output is clamped at zero. 0.0 to 100.0% 0.0%
375 LIMIT Symmetrical limit for intermediate scaling and the total 0.00 to 200.00% 105.00%
output.
423 INPUT 2 INPUT 2 value. ±200.00% 0.00%
100 INPUT 1 INPUT 1 value. ±200.00% 0.00%
309 INPUT 0 INPUT 0 value. ±200.00% 0.00%