NXS Form 63-2600, Users Manual, Technical Data - CONTROL ...

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100 Pump and Fan Control Application Honeywell 7.4 Short description of function and essential parameters 7.4.1 Automatic changing between drives (Autochange, P2.9.24) The Autochange function allows the starting and stopping order of drives controlled by the pump and fan automatics to be changed at desired intervals. The drive controlled by frequency drive can also be included in the automatic changing and locking sequence (par. 2.9.25). The Autochange function makes it possible to equalize the run times of the motors and to prevent e.g. pump stalls due to too long running breaks. • Apply the Autochange function with parameter 2.9.24, Autochange. • The autochange takes place when the time set with parameter 2.9.26, Autochange interval, has expired and the capacity used is below the level defined with parameter 2.9.28, Autochange frequency limit. • The running drives are stopped and re-started according to the new order. • External contactors controlled through the relay outputs of the frequency drive connect the drives to the frequency drive or to the mains. If the motor controlled by the frequency drive is included in the autochange sequence, it is always controlled through the relay output activated first. The other relays activated later control the auxiliary drives (see Figure 7-5 and Figure 7-6). Parameter 2.9.24, Autochange 0 Autochange not used 1 Autochange used The automatic change of starting and stopping order is activated and applied to either the auxiliary drives only or the auxiliary drives and the drive controlled by the frequency drive. depending on the setting of parameter 2.9.25, Automatics selection. By default, the Autochange is activated for 2 drives. See Figure 7-1 and Figure 7-5. Parameter 2.9.25, Autochange/Interlockings automatics selection 0 Automatics (autochange/interlockings) applied to auxiliary drives only The drive controlled by the frequency drive remains the same. Therefore, mains contactor is needed for one auxiliary drive only. 1 All drives included in the autochange/interlockings sequence The drive controlled by the frequency drive is included in the automatics and a contactor is needed for each drive to connect it to either the mains or the frequency drive. Parameter 2.9.26, Autochange interval After the expiry of the time defined with this parameter, the autochange function takes place if the capacity used lies below the level defined with parameters 2.9.28 (Autochange frequency limit) and 2.9.27 (Maximum number of auxiliary drives). Should the capacity exceed the value of P2.9.28, the autochange will not take place before the capacity goes below this limit. • The time count is activated only if the Start/Stop request is active at control place A. • The time count is reset after the autochange has taken place or on removal of Start request at control place A Parameters 2.9.27, Maximum number of auxiliary drives and 2.9.28, Autochange frequency limit These parameters define the level below which the capacity used must remain so that the autochange can take place. Automation and Control Solutions Honeywell Honeywell Limited-Honeywell Limitée 1985 Douglas Drive North 35 Dynamic Drive Golden Valley, MIN 55422 Scarborough, Ontario 63-2600-1 MIV 4Z9 www.honeywell.com
Honeywell Pump and Fan Control Application 101 This level is defined as follows: • If the number of running auxiliary drives is smaller than the value of parameter 2.9.27 the autochange function can take place. • If the number of running auxiliary drives is equal to the value of parameter 2.9.27 and the frequency of the controlled drive is below the value of parameter 2.9.28 the autochange can take place. • If the value of parameter 2.9.28 is 0.0 Hz, the autochange can take place only in rest position (Stop and Sleep) regardless of the value of parameter 2.9.27. Automation and Control Solutions Honeywell Honeywell Limited-Honeywell Limitée 1985 Douglas Drive North 35 Dynamic Drive Golden Valley, MIN 55422 Scarborough, Ontario 63-2600-1 MIV 4Z9 www.honeywell.com
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NX Series Constant and Variable Tor
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CONTENTS NX USER’S MANUAL INDEX 1
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NX User's Manual Index 1. SAFETY...
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1 6(110) Safety 1. SAFETY ONLY A CO
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8(110) DIRECTIVES 2. DIRECTIVES 2.1
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10(110) DIRECTIVES We Manufacturer'
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3 12(110) Receipt of shipment We Ma
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3 14(110) Receipt of shipment 3.3 M
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16(110) Technical data The control
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5 24(110) Installation 5. INSTALLAT
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5 26(110) Installation W2 H4 D1 D2
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5 34(110) Installation 5.2 Cooling
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5 36(110) Installation 5.3 Power lo
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5 38(110) Cabling and connections 5
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40(110) Cabling and connections 6.
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42(110) Cabling and connections 6.1
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66(110) Cabling and connections OPT
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7 70(110) Control keypad 4 5 6 READ
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7 72(110) Control keypad 7.2 Keypad
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7 74(110) Control keypad RE ADY I/O
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7 76(110) Control keypad 7.3.2 Para
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7 84(110) Control keypad 50 Analog
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7 86(110) Control keypad 7.3.6 Syst
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7 88(110) Control keypad T6.8.2.2 C
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7 90(110) Control keypad STOP I/Ote
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7 92(110) Control keypad Automatic
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7 98(110) Control keypad READY READ
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7 100(110) Control keypad STOP READ
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7 102(110) Control keypad READY REA
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106(110) Commissioning 6 Connect th
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108(110) Fault tracing 9. FAULT TRA
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110(110) Fault tracing 43 Encoder f
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NX Series Constant and Variable Tor
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2 Honeywell ABOUT THE "All in One"
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4 Honeywell 9.1 External brake cont
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6 Basic Application Honeywell 1.2 C
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8 Basic Application Honeywell 1.4 B
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10 Basic Application Honeywell 1.4.
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12 Standard Application Honeywell 2
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22 Local/Remote Control Application
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36 Multi-step Speed Application Hon
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48 PID Control Application Honeywel
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150 Description of Parameters Honey
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210 Appendices Honeywell 9. APPENDI
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212 Appendices Honeywell 9.2 Closed
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Automation and Control Solutions Ho
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