10.618.6 (ID 168) PID Reference 2
Location in the menu:
P3.5
(PID Control Application, Pump and Fan Control Application)
Use this parameter to set the reference value of the PID controller.
The PID controller keypad reference 2 can be set between 0–100%. This reference is active if the DIN 5 function = 13 and the DIN 5
contact is closed.
10.618.7 R3.5 Torque Reference
Location in the menu:
R3.5
(Multi-Purpose Control Application)
Define here the torque reference within -300.0…300.0%.
10.619 Master/Follower Function
This function is only available for VACON
®
NXP.
The Master/Follower function is designed for applications in several VACON
®
NXP drives run the system and the motor shafts are
coupled to each other via gearing, chain, belt and so on. We recommend using the Closed Loop control mode.
The external Start/Stop control signals are connected to the Master drive only. Speed and torque references and control modes are
selected for each drive separately. The Master controls the Follower(s) via a SystemBus. The Master station is typically speed-control-
led and the other drives follow its torque or speed reference.
Torque control of the Follower must be used when the motor shafts of the Master and Follower drives are solidly coupled to each
other by, for example, gearing, or a chain. Thus, no speed difference between the drives is possible. Window control is recommen-
ded to keep the speed of the follower close to that of the master.
Speed control of the Follower must be used when the demand of speed accuracy is lower. In such cases, use of load drooping is
recommended in all drives to balance the load.
Master/Follower Link Physical Connections
, the master drive is on the left side and all others are followers. The master/follower physical link can be built with
OPTD2 option board. See VACON
®
NX I/O Boards User Manual for further information.
Optical Fiber Connection between AC drives with OPTD2
The OPTD2 board in the Master has the default jumper selections, that is, X6:1–2, X5:1–2. For the followers, the jumper positions
have to be changed: X6:1–2, X5:2–3. This board also has a CAN communication option that is useful for multiple-drive monitoring
with VACON
®
NCDrive PC software, when commissioning Master Follower functions or line systems.
OPTD2
Jumper X5 : TX1
X6 : ON
Master
SBInUse
SBID
SBNextID
SBLastID
=Yes
=1
=2
=4
SBInUse
SBID
SBNextID
SBLastID
=Yes
=2
=3
=4
SBInUse
SBID
SBNextID
SBLastID
=Yes
=3
=4
=4
SBInUse
SBID
SBNextID
SBLastID
=Yes
=4
=1
=4
Follower
Follower
Follower
Jumper X5 : TX2
X6 : ON
Jumper X5 : TX2
X6 : ON
Jumper X5 : TX2
X6 : ON
OPTD2
OPTD2
OPTD2
H1
(RX)
H2
(TX)
H1
(RX)
H2
(TX)
H1
(RX)
H2
(TX)
H1
(RX)
H2
(TX)
e
3
0
b
h
0
1
9
.1
0
Illustration 96: System Bus Physical Connections with the OPTD2 Board
For information on the OPTD2 expander board parameters, see VACON
®
NX I/O Boards User Manual.
10.620 External Brake Control with Additional Limits (IDs 315, 316, 346–349, 352, 353)
The external brake used for extra braking can be controlled through parameters ID 315, ID 316, ID 346-349, and ID 352/ID 353. Se-
lecting On/Off Control for the brake, defining the frequency or torque limit(s) the brake must react to and defining the Brake-On/-
Off delays allow an effective brake control.
The brake control is disabled during Identification Run (see parameter
ID 631
).
AB296635287482en-000301 / DPD00903
306 | Danfoss A/S © 2023.02
Parameter Descriptions
VACON® NX All-in-One
Application Guide
Summary of Contents for VACON NX
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