Norgren VP51 DeviceNet Installation Instructions - Manual (Page 7)

7
Parameter
No.
Name Format Default
Value Class
Id Instance
Id Attribute
Id Byte
length
4 Actual
Pressure
Read only integer, 0-4095
0 = minimum (zero) pressure
4095 = full scale output + 5%
span
(same as polled input) - 4 13
(0x0D) 3 2
5 Status
Byte
Read only byte (same as
polled input) - 4 13(0x0D) 3 1
6 Speed Selectable integer, 0-7
0 = fastest, 7 = slowest
See fig. 1 0 3 1 104
(0x68)
1
7 Prop Gain Selectable integer 0-7
0 = low gain, 7 = high gain
(see note 3) See fig. 3 4 3 1 105
(0x69)
1
8 Int Gain Selectable integer 0-7
0 = low gain, 7 = high gain
(see note 3) See fig. 3 4 3 1 106
(0x6A)
1
9 Dither
Amplitude
Selectable integer 0-7
0 = no dither, 7 = maximum
dither 4 3 1 107
(0x6B)
1
10 Error Limit Selectable 0=105% (0-4095)
0 = Error Limit Off
105% = Full scale output + 5% 10%
(390) 3 1 109
(0x6D) 1
11 Error Delay Integer 0-999
Set in 100ths of a second
200
(2 secs) 3 1 110
(0x6E) 2
12 Threshold
A
Selectable 0-105% (0-4095)
0 = Status Bit 2 always set
105% = Full scale output + 5% 50%
(1950) 3 1 111
(0x6F) 1
13 Threshold
B
Selectable 0-105% (0-4095)
0 = Status Bit 3 always set
105% = Full scale output + 5% 100%
(3900) 3 1 112
(0x70) 1
14 Pressure
Units
Selectable from:
Bar, psi, kPA, Atm, kg/cm^2
Sets units for pressure display
on LCD Depends
on part
number 3 1 108
(0x6C) 1
15 Signal
Failure
Mode
Selectable from Fail Safe, Fail
Freeze
Sets operation of device on
loss of polled signal from
network (see note 2). Fail Safe 3 1 113
(0x71) 1
Notes:
1) If the baud rate parameter is set to Autobaud the Device will automatically listen to the network and
work out the correct baud rate. The baud rate parameter will then automatically be set to the
appropriate baud rate and will remain at its new setting even after removing power from the Device. In
order to run the Autobaud function again, the baud rate must be changed back to Autobaud via
DeviceNet or via the keypad.
2) Demand Pressure can only be set by means of a polled I/O message. It can be read but not set by
explicit messaging. If no polled message is received, the output pressure is set according to parameter
15 – Signal Failure Mode. If Fail Safe is selected, the output pressure will be zero when no polled
messages are being received. If Fail Freeze is selected, the output pressure will remain at its last set
value when no polled messages are being received.
3) To set the proportional gain, first set the integral gain to 0, then adjust the proportional gain to give the
best possible response time without causing unacceptable overshoot or oscillations.
Once proportional gain is set correctly, increase integral gain to achieve the best possible accuracy
without causing unacceptable hunting (slow oscillations) on the output. See figs 2 & 3.