
6-68
Programming Your Application
590+ Series DC Digital Converter
SETPOINT SUM 1
Use this block to sum and scale up to three
analog inputs to produce the SPT. SUM
output.
This block is ignored by the drive unless
SYSTEM::CONFIGURE I/O::BLOCK
DIAGRAM::SPT SUM 1 DEST is connected
to a non-zero tag. The default connection is to
Tag 289, SETPOINT 1.
Analog Input 1, terminal A2 is the default
input. By default, the output SPT. SUM
connects to SETPOINT 1 in the speed loop.
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 the SPT. SUM output.
Setpoint Sum 1
SPT. SUM
[ 86]
–
0.00 %
1.0000
–
[ 6] RATIO 1
1.0000
–
[208] RATIO 0
POSITIVE
–
[ 8] SIGN 1
POSITIVE
–
[292] SIGN 0
1.0000
–
[419] DIVIDER 1
1.0000
–
[420] DIVIDER 0
0.0 %
–
[131] DEADBAND
105.00 %
–
[375] LIMIT
0.00 %
–
[423] INPUT 2
0.00 %
–
[100] INPUT 1
0.00 %
–
[309] INPUT 0
MMI Menu Map
1
SETUP PARAMETERS
2
SETPOINT SUM 1
RATIO 1
RATIO 0
SIGN 1
SIGN 0
DIVIDER 1
DIVIDER 0
DEADBAND WIDTH
LIMIT
INPUT 2
INPUT 1
INPUT 0
Parameter
Tag
Range
SPT. SUM
86
xxx.xx %
(SPT SUM OUTPUT)
Refer to the DIAGNOSTICS function block description, page 6-23.
RATIO 1
6
-3.0000 to 3.0000
Multiplier term for INPUT 1.
RATIO 0
208
-3.0000 to 3.0000
Multiplier term for INPUT 0.
SIGN 1
8
NEGATIVE / POSITIVE
Polarity for INPUT 1.
SIGN 0
292
NEGATIVE / POSITIVE
Polarity for INPUT 0.
DIVIDER 1
419
-3.0000 to 3.0000
Divider scaling for INPUT 1. Dividing by 0 (zero) results in a zero output.
DIVIDER 0
420
-3.0000 to 3.0000
Divider scaling for INPUT 0. Dividing by 0 (zero) results in a zero output.
DEADBAND
131
0.0 to 100.0 % (h)
(DEADBAND WIDTH)
Range within which the output is clamped at zero.