恒壓供水系統(tǒng) 全自動(dòng)恒壓供水控制原理 當(dāng)主水管網(wǎng)壓力傳感器的壓力信號4~20mA送給數(shù)字PID控制器，控制器根據(jù)壓力設(shè)定值與實(shí)際檢測值進(jìn)行PID運(yùn)算，并給出信號直接控制變頻器的轉(zhuǎn)速以使管網(wǎng)的壓力穩(wěn)定。當(dāng)用水量不是很大時(shí)，一臺泵在變頻器的控制下穩(wěn)定運(yùn)行；當(dāng)用水量大到變頻器全速運(yùn)行也不能保證管網(wǎng)的壓力穩(wěn)定時(shí)，控制器的壓力下限信號與變頻器的高速信號同時(shí)被PLC檢測到，PLC自動(dòng)將原工作在變頻狀態(tài)下的泵，投入到工頻運(yùn)行，以保持壓力的連續(xù)性，同時(shí)將一臺備用的泵用變頻器起動(dòng)后投入運(yùn)行，以加大管網(wǎng)的供水量，保證壓力穩(wěn)定。若兩臺泵運(yùn)轉(zhuǎn)仍，則依次將變頻工作狀態(tài)下的泵投入到工頻運(yùn)行，而將另一臺備用泵投入變頻運(yùn)行。當(dāng)用水量減少時(shí)，首先表現(xiàn)為變頻器已工作在最低速信號有效，這時(shí)壓力上限信號如仍出現(xiàn)，PLC首先將工頻運(yùn)行的泵停掉，以減少供水量。當(dāng)上述兩個(gè)信號仍存在時(shí)，PLC再停掉一臺工頻運(yùn)行的電機(jī)，直到最后一臺泵用主頻器恒壓供水[4]。另外，控制系統(tǒng)設(shè)兩臺泵為一組，每臺泵的電機(jī)累計(jì)運(yùn)行時(shí)間可顯示，24小時(shí)輪換一次，既保證供水系統(tǒng)有備用泵，又保證系統(tǒng)的泵有相同的運(yùn)行時(shí)間，確保了泵的可靠壽命V/xsz10, 2492951k1a-1-no2-f2, yn7000890f
a20b-1003-0864/01a
la-5600/la5600, Art.-Nr. 9080-0566
5F/3000 # A06B-0346-B256
HURCO Dual Axis Board 415-0176-001A/415-0176-009A
Landis Mom Enhanced PC Board, # A130488
Giddings & Lewis 502-02778-50
Typ # bd02035aaa
as-s202-020
e4809-770-032-1
414-0177-002e
allen bradley 810-a22c
414-0176-904/415-0176-604
852 437, 813 189f
415-0176-904
b48333-801/b48333-801c
088l3278
AM850-20D-T
a16b-2202-0540/10c
A16B-2202-0540/11C
ct8121440d
A20B-0009-0140/04C
Arst - 5xb-11
6VAF343007B-A2
A05B-2452-C471, ab RJ3iB
a06b-6098-h001
dr1-08aa
a12/3000, # a06b-0143-b077
44a723622-001 r04/5 mit 44a726819-001
Mazak PC Board, 05-Folge i/o-1, d70jv005840
P/N 340528, g34924-k1025-h2-c1
Mod # 1-0sp, a06b-0373-b169
Balluff btl12a0 , btl7-e570-m1220-z-s
1908008
A06B-0371-B569, Encoder # A860-0346-T041
Rexroth Bosch PC Board, 1070077001-701
PM 550-210
1775-MS4
A111-03YYY-HY4-MM
a111-33137-h04
5kn-et4-3-9.52-0, ts5017 n64
415-0176-008j
MSDA 403d1a
MQM012T2V, 410622-1310
General Electric 531 x 111
Makino PC Board, F930 78 72 (2) A, A55E/A88-PCB-A
a06b-0314-b504 #7008
3hab8101-8/08y
90-4K
prd-0017000l-30, prd-0016600d-30, prd-0016400l-10
prd-00017000l-45, prd-0016700d-00, prd-0016400l-10
g3fj-32-60-075d
# z5000
P.MOS-001E
a86l-0027-0001 #102
22-13-88-00/03/12-08-28-00/03/12-08-36-00/06
a16b-2202-0741/04a
100SHN-4T-R-X1A-D10
193-230587-001, vaeabd, 193-250587-a-01
H064857
A20B-0002-0943/19E
a20b-3300-0020/06a
50-1050-E
6sn1123-1aa00-0ca1
VLT-40MII/VLT-40M2
vlt-40mii
HU 661
Trudex ED-15994 LT25
Mod bis1/6000 # a06b-0116-b204, 6000 RPM, MFG 2007-09
mn-290a j1/0
CT208132841C, 20851 7281D
A135773
fis-0810-0019
a20b-2001-0150/01b
CT8132570
Charmilles 1994 Roboform c400 PC Board, 852 432/813188e
FANUC PC BOARD, a20b-1006-048
852 432/813188e
Shibaura VMC Platine # h064856
Daifuku Platine # b4-mem-g1
CMC randtronics Servo Board, # 540D15014
Sodick FS-A5C ATM-002C-1
PLCB 02-02-FW, SLM 2-02/01
PLCB 02-02
c41s-0701aa300
bis1/6000 # a06b-0116-b204
FANUC mf-m5 CRT UNIT, # a02b-0094-c071
NSD VS-5B Controller Unit, VS-5B
NSD Controller VS-5B Einheit, Typ # VS-5B
P421-431
a06b-0313-b231
3HAB-2136-1/4
RT301-116
djl36400e53
Fuji PC Platine, fcs4 CPU, es-v5055
Gleason Platine # 25970011
570 281.9001.03
a20b-3300-0394/01a
B-204-B-11
fanuc master platine, a20b-0010-0100/02b
44A719337-104, EPM01, 44A723603-001 R00/0
8000-mdbz, 90565403
a16b-8200-0011/06a
ID15J1F33-ER
a06b-0346-b357
a20b-3300-0362/02a
fetb - 01-g, by171a360g51
FGSS 1350-21
A05B-2302-C020
a06b-0632-b001
03.25 sb2a
rmh1/8-20l, 20:1
A16B-2203-0740/05A
4mb535a mit bn634a691g51
01-6065YB-29
584/0075/0/8/0/0/0/000
a20b-1001-0700/01a
A16B-1212-0870/06A
3-424-2082A
bb-15a, bn520e879h01a
93938751
AU-12-50
Allen Bradley PC Board, 8000-MDC
FANUC Netzteil # A14B-0051-B001/03
hd-30-029, mit Sanyo g1811-108-6
Bridgeport Platine # 1936004
JANCD-mm01b, df8000019
a02b-0063-c001, a61l-0001-0076, tr-9dk1
Omron f300-l100v2
rth-1m-sp
sgdc - 050505ara
AB3601
126-100-430
047423, 047833
JANCD-sp01, df8100269
a06b-0531-b001
sdf1525-12-124
2-26861-aa/g24k4m
TVM 2.1-50w1-115v
Trudex KT0-0937-00
ha40-kn Arst - 5xb-11
MQM042T2U, 410622-0890
TS4144N11E36
l15-000-mpd0, b15-096-a3l0
SGDV-r90ae1a002000
853 9600
813188e 852 432
C80030/C80030/1.0
D70UB004200, FJV-20
a06b-0522-b543 #0008
a16b-2202-0985/01a
9a, # e7191-292-325-1
a14b-0067-b001
A02B-0060-C001, A16B-1600-0042
gpp12503
QUx80MB4
P452-012
A02B-0051-C032, A860-0200-T021
DSQS 118, YB161100-BB/2
a20b-1000-0700/04b
VT14728N4
msm152e2g
e2710pdb-SDHT, nm123a-11
31-50204N11 PWB 30-50204N01
Mitsubishi PC Board, fw31a, by171e362g52
Hitachi sj100-040hfu
SS7B -351
2MM9318WI
t4c3b1 r0506
mc721b, cin624a807g53a
a02b-0163-c301
415-0177-001D
HBL-078163
801431-6R
A02B-0092-C052
572-02722-50
01-20ly-50, 60:1
Art.-Nr. 923606
10bb1bf-b
at1429lb22-tc35
MSMA 302D7V3
884 a-200
A03.1544
OP-RC5-1, 410110-0200
KEBA CR 041 Slot Rack Geh?use 24680
VFC01
a13b-0042-c570
A13B-0042-C424, A860-0201-T001
93972750
DIN1220150B
3hab8101-8/08y
a20b-1004-0854/04a, aus der a06b-6066-h011
A06B-0346-B256-R
DV 200/75
D10-M
Fuji Electric Getriebemotor, # lssg 308p5
FANUC AC Servo Motor 2-O, Typ A06B-0521-B052
Brother PC Board, B521097-5???, B521097-2
B281-001
FANUC PC BOARD, a16b-1000-0200/06d
YZ14B-2, HD52A
GMT075L20
177825-bba
sgdc - 010101ara
a16b-1100-0130/03a
A20B-0008-0244/02A
fw712a, by171a391g51
408-71781
088l3415
mqm022t4v, 410622-1300
2ek 16809-3, 2em8513-3
KS-YZ405B-2
jafmc-hfg04 Rev c11, df8203578-b1
gt6-l5-pb
3 531 4200a
as110803
P/N d-1t10028
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