Nivetec UNICONT PMM-500, User And Programming Manual

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11.3.2 W
ORD
P
ARAMETERS
MODBUS PARAMETER
NUMBER MODE
CONTROLLING
PARAMETER
NOTES
1 RO Process Variable Current value of PV
If under-range = 62976,
If over-range = 63232
2 R/W Setpoint Value of currently selected setpoint.
Target setpoint if ramping.
3 R/W Output Power 0% to 100% for single output; -100%
to +100% for dual output control.
Read Only if not in manual control
4 RO Deviation Difference between Process Variable
and Setpoint (value = PV-SP)
5 R/W Secondary Proportional
Band
Adjustable 0.0% to 999.9% of input
span. Read only when Self-Tuning
6 R/W Primary Proportional
Band
Adjustable 0.0% to 999.9% of input
span. Read only when Self-Tuning
7 R/W Direct / Reverse Acting 1 = Direct Acting,
0 = Reverse
8 R/W Automatic Reset Time
(or Loop Alarm Time) Integral Time Constant value. (or Loop Alarm Time
value in ON/OFF control mode if Loop Alarm
Enabled)
Read only if Self-Tuning.
Modbus range: 0 to 5999
9 R/W Rate Derivative Time Constant value. Read only if Self-
Tuning.
Modbus range: 0 to 5999
10 R/W Output 1 Cycle time 0.5, 1, 2, 4, 8, 16, 32, 64,128, 256 or 512 seconds
11 R/W Scale Range Lower
Limit Lower limit of scaled input range
selectable between-1999…+9999
12 R/W Scale Range Upper
Limit Upper limit of scaled input range
selectable between-1999…+9999
13 R/W Alarm 1 Value Alarm 1 active at this level
14 R/W Alarm 2 Value Alarm 2 active at this level
15 R/W Manual Reset Bias value. 0% to 100% for single
control output or
-100% to +100% for dual outputs
16 R/W Overlap / Deadband
20% to +20% of (

+

)
Negative value = Deadband,
Positive value = Overlap
17 R/W ON - OFF Differential 0.1% to 10.0% of input span
Used for Primary output on/off
differential and for combined Primary
and Secondary on/off differential.
18 R/W Decimal Point Position 0 = xxxx, 1 = xxx.x, 2 = xx.xx, 3 = x.xxx
Read only if not Linear Input
19 R/W Output 2 Cycle Time 0.5, 1, 2, 4, 8, 16, 32, 64,128, 256 or 512 seconds
20 R/W Primary Output Power
Limit Safety power limit; 0 to 100 %
21 RO Actual Setpoint Current (ramping) value of selected setpoint
22 R/W Setpoint Upper Limit Maximum setpoint value. Current SP to Input
Range Maximum
23 R/W Setpoint Lower Limit Minimum setpoint value. Current SP to Input
Range Minimum
24 R/W Setpoint Ramp Rate 0 = OFF, 1 to 9999 increments / hour.
Dec Point position as for input range.
25 R/W Input Filter Time
Constant 0 to 100 seconds
26 R/W Process Value Offset Modified PV = Actual PV + PV Offset. Limited by
Scale Range Maximum and Scale Range
Minimum
-999…+999