PLC的基本工作方式是順序執行用戶程序，每一時鐘周期執行一條指令。對用戶程序的執行一般有循環掃描和定時掃描兩種，掃描過程分為三個階段，即輸入採樣階段、程序執行階段和輸出刷新階段，如圖1所示。
HONEYWELL RP818A1004 *NEW IN THE BOX*
HONEYWELL SVP1-DILNG DIFFUSE SENSOR *NEW IN A FACTORY B...
HONEYWELL C7031D 1005 MOISTURE PROOF 3" SENSOR *USED*
HONEYWELL SZL-VL-F MINI LIMIT SWITCH *NEW IN A BOX*
HONEYWELL R7847 A 1033 RECTIFICATION FLAME *NEW IN A BO...
HONEYWELL T644A 12492 TEMPERATURE CONTROL *NEW IN A BOX...
HONEYWELL 410-1016 CAMERA HOUSING *USED*
HONEYWELL MPS32HD
HONEYWELL LSM2H *NEW IN BOX*
HONEYWELL NRAK1111F *NEW*
HONEYWELL LSYUB1A13 *NEW*
HONEYWELL MP2D1HD PHOTOELECTRIC HEAD *NEW IN A BOX*
HONEYWELL MP2D4HD PHOTOELECTRIC HEAD *NEW IN A BOX*
HONEYWELL 9305905 PRESSURE TRANSDUCER *NEW OUT OF A BOX...
HONEYWELL 2MN11 *NEW*
HONEYWELL 914CE16-9 *USED*
HONEYWELL OUTPUT MODULE 621-2101RC *USED*
HONEYWELL T6031K1001 TEMPERATURE CONTROL *NEW IN A BOX*
HONEYWELL LSZ1D LIMIT SWITCH OPERATING HEAD *NEW IN A B...
LOT OF 2 HONEYWELL 6PA16 BASIC SWITCH / GALENA DIECAST ...
HONEYWELL T6051A 1016 HEAVY DUTY HEAT / COOL THERMOSTAT...
HONEYWELL C645B1013 GAS/AIR PRESSURE SWITCH *NEW IN A B...
HONEYWELL ML7285-C-1005 *NEW*
HONEYWELL GKZ51 *NEW IN THE BOX*
HONEYWELL LSC1A *NEW IN A BOX*
HONEYWELL 316165B *NEW IN THE BOX*
HONEYWELL MPT27HD *NEW IN A BOX*
HONEYWELL LSZ1W *NEW*
HONEYWELL PNEUMATIC THERMOSTAT TP970A 2004 *NEW IN BOX*
HONEYWELL INPUT MODULE 621-1160R
HONEYWELL PNEUMATIC THERMOSTAT TP970A 2004 *NEW IN BOX*
HONEYWELL INPUT MODULE 621-1160R
HONEYWELL C437G1002 PRESSURE GAS/AIR SWITCH *NEW IN A B...
HONEYWELL 982FS0.8-A3NL *USED*
HONEYWELL Q607A 1076 AUXILIARY SWITCH *NEW*
HONEYWELL TVEZ-2-4-0-000-?0-0U0000-00 *USED*
HONEYWELL 30756669-002 POWER/INPUT PWA BOARD *USED*
HONEYWELL DC330B-K0-000-2?0-000000-E0-0 *NICE*
HONEYWELL L404B 1312 2 *USED*
HONEYWELL BZV6-2RQ SNAP ACTION BASIC SWITCH (WHITE/RED ...
HONEYWELL FEF-PAT4-M *NEW*
SEALED HONEYWELL T834C1137
HONEYWELL FE-XFRM-F9-133
HONEYWELL L404C10142 PRESSURETROL *USED*
HONEYWELL C7027A 1064 *USED*
HONEYWELL C437G 1036 GAS/AIR PRESSURE SWITCH *USED*
HONEYWELL 10267A-1-0-00-0?-10001-000-00 *USED*
HONEYWELL ST7800 A 1005 *NEW IN A BOX*
HONEYWELL 30755161 *USED*
HONEYWELL SDS-MBSBC *USED*
HONEYWELL 30755808-001 *USED*
HONEYWELL C7612E1104 DYNAMIC SELF-CHECK FSG *NEW*
HONEYWELL S87D 1012 *NEW*
HONEYWELL DR45AT-1110-00-?000-0-000000-0 TRULINE CHART *...
HONEYWELL 14CE2-1 *USED*
HONEYWELL L4048 1353 *USED*
HONEYWELL LSD6B HEAVY DUTY LIMIT SWITCH 600VAC *NEW IN...
LOT OF 2 HONEYWELL UNIVERSAL WIRING SUBBASE-PANEL MOUNT...
HONEYWELL BZE6-2RQ81 *NEW IN A BOX*
HONEYWELL C437E1012 *NEW IN A BOX*
HONEYWELL SKINNER VALVE V5D56180
LOT OF 2 HONEYWELL MHP-C233L PHOTOELECTRIC SENSOR *NEW ...
HONEYWELL RP67013 1009 *NEW IN A BAG*
HONEYWELL 2PL1 *NEW*
HONEYWELL R482B T007 SWITCHING RELAY *NEW IN A BOX*
HONEYWELL SA7B DIRECT SPARK IGNITION *NEW OUT OF A BOX*
HONEYWELL TEMPERATURE CONTROLLER L480B 1239 *NEW*
HONEYWELL DC2005-0-0000-0?0FM-00-0111 TEMPERATURE CONTRO...
HONEYWELL DC2005-0-0000-0?000-00-0111 TEMPERATURE CONTRO...
LOT OF 2 HONEYWELL BZ-2RD *NEW*
HONEYWELL MICRO SWITCH BZ-R-A2 *NEW*
HONEYWELL 5LS1-4PG *NEW*
HONEYWELL B13DK1100 *USED*
HONEYWELL IWS-1603-HW *USED*
HONEYWELL C7012A 1145 *USED*
HONEYWELL MP2S11 PROXIMITY SENSOR *NEW IN A BOX*
HONEYWELL SERVO PLATE ASY TRULINE DR4500 30754975-503 *...
HONEYWELL AT72D1725 TRANSFORMER 120-24 40VA *NEW IN A ...
HONEYWELL BZE6-2RQ62 *NEW IN THE BOX*
TRADELINE HONEYWELL RA890E 1629 PROTECTORELAY *NEW*
HONEYWELL D2500-E0-0L00-1?00-10000-00-0 *USED*
HONEYWELL Q5001A1006 W/ M9182A1011 *NEW OUT OF BOX*
HONEYWELL LIMIT SWITCH BZE6-2RN81 *AS IS*
HONEYWELL DC300K-E-200-11?-0000-0
HONEYWELL DC2003-0-0000-0?000-EI-0122 *NICE*
HONEYWELL ADAPTER BRACKET 220738A *NEW IN BOX*
HONEYWELL 53C35K *NEW IN A BOX*
HONEYWELL 14CE10-3 LIMIT SWITCH *USED*
HONEYWELL MICRO SWITCH MPL2 *NEW*
HONEYWELL TK-RPCXX1 POWER SUPPLY *USED*
HONEYWELL BZ-2RD24-A2 *NEW*
LOT OF 11 HONEYWELL ST7800A 1013 FIXED 7 SECOND PURGE
HONEYWELL MPS17 *NEW*
LOT OF 2 HONEYWELL PTCB *NEW*
HONEYWELL MHP-TLE30L *NEW IN A FACTORY BAG*
HONEYWELL S443A 1007 RHEOSTAT AND TOGGLE SWTICH *NEW*
HONEYWELL HPF-T010-H *NEW*
HONEYWELL HPX-A1-H *NEW*
LOT OF 2 HONEYWELL MPB10 *NEW IN A BOX*
HONEYWELL LSZ1H *NEW OUT OF A BOX*
HONEYWELL DC300K-E-000-20?-0000-0 TEMPERATURE CONTROLLER...
HONEYWELL C7012E1278 UV FLAME DETECTOR *NEW IN A BOX*
HONEYWELL 914CE28-6 LIMIT SWITCH *USED*
HONEYWELL DC2500-EE-0L0R-?200-10000-00-0 TEMP. CONTROLLE...
HONEYWELL 914CEI-3 *NEW IN A BOX*
HONEYWELL MICRO SWITCH GKBA14L7 *NICE*
HONEYWELL RA890G-1260 PROTECTOR RELAY 120V *NEW IN A B...
HONEYWELL LSZ7A1A HEAVY DUTY LIMIT SWITCH (AS PIC.) *N...
HONEYWELL R7847A1025 *USED*
HONEYWELL 922AA2XM-A9P-L *NEW*
HONEYWELL 73419AN2NN00N0C?111P3 *NEW OUT OF BOX*
HONEYWELL 7131Z002 N0C111P3 *USED*
HONEYWELL 203579F *NEW OUT OF A BOX*
HONEYWELL 6PA4-RH *NEW IN A BOX*
HONEYWELL BZE6-2RQ9 LIMIT SWITCH *NEW IN A BOX*
HONEYWELL SKINNNER VALVE A4LB2077 *NEW*
LOT OF 2 HONEYWELL LS24001 *NEW IN A BOX*
HONEYWELL MPT33HD *NEW IN A BOX*
HONEYWELL 621-0010-AR *USED*
HONEYWELL FF-SR25980E *NICE*
LOT OF 4 HONEYWELL LIMIT SWITCH BZ-2RW13-A2 *NEW IN BO...
HONEYWELL CLSB7A CABLE PULL LIMIT SWITCH *USED*
LOT OF 2 HONEYWELL SWITCH ACTUATOR (HEAD PIECE ONLY) 9P...
HONEYWELL TG510A 1001 *NEW IN A BOX*
HONEYWELL X5L22500 *NEW OUT OF A BOX*
HONEYWELL FF-SRS 59252 *NICE*
HONEYWELL Q340A1074 24" UNIVERSAL THERMOCOUPLE *ORIGINA...
HONEYWELL DC330B-KE-000-2?0-000000-00-0 *NICE*
HONEYWELL C645D 1052 AIR PRESS SWITCH *USED*
HONEYWELL DC3005-0-000-1-?00-0111 *USED*
HONEYWELL VALVE 72218BN3TN00N0C?111P3
HONEYWELL DM106-0-B-00-0-?R-1-00000-000-U?1 *USED*
HONEYWELL DC330L-EE-000-1?0-0A0000-00-0 *USED*
HONEYWELL Q27A1024 UNIVERSAL FSG. MTG. BASE FOR RA890 *...
HONEYWELL M7284A1004 ACTUATOR MOTOR *USED*
HONEYWELL M9184D1013 ACUATOR MOTOR *USED*
HONEYWELL V48A 2177 DIAPHRAGM GAS VALVE 1-1/4"NPT *USED...
HONEYWELL DC230L-EE-00-10?0A00000-00-0 *USED*
HONEYWELL MODUTROL IV M6194D 1017 *USED*10
HONEYWELL 914CE2-26 *NICE*
HONEYWELL D200E-2-000-1C0?000-0 *USED*
HONEYWELL T915D1240 *NICE*
HONEYWELL SKINNER VALVE 71215SN2VN00N0C?111P3 *NEW*
HONEYWELL 106729 GLASS LENS *NEW IN A BOX*
HONEYWELL DC2500-E0-0A00-?200-00000-00-0 *USED*
HONEYWELL MICRO SWITCH LSD1A *NEW*
HONEYWELL 982FS0. 8-A3N-L *NEW IN A BOX*
HONEYWELL BZV6-RQ2X2 *USED*
HONEYWELL L604A 1011 *NICE*
HONEYWELL R482 C 1089 SWITCHING RELAY 240V *NEW IN A BO...
HONEYWELL MICROSWITCH 11ZS1 LIMIT SWITCH 500V (AS PICT...
HONEYWELL ISOLATED ANALOG INPUT 621-0022-V *NICE*
HONEYWELL 914CE1-3 COMPACT LIMIT SWITCH *NEW IN A BOX*
HONEYWELL L404T1030 *USED*
HONEYWELL 205830A *NEW IN THE BOX*
HONEYWELL 206LS1 LIMIT SWITCH *NEW IN A BOX*
HONEYWELL SP970B 1003 *NEW*
HONEYWELL DC5061-0-0000-2?00-00-0211 CONTROLLER *USED*
HONEYWELL FF-SB14A06K-S2 *USED*
HONEYWELL V4055D 1001 *USED*
HONEYWELL MICRO SWITCH 18PA1 *NEW*
HONEYWELL 6PA4-LH LIMIT SWITCH *NEW IN A BOX*
HONEYWELL M7284Q1009 *USED*
HONEYWELL 65-610-0001 POWER SUPPLY BOARD *USED*
HONEYWELL 922FS0.8-84P-G *USED*
HONEYWELL 2MN1 *NEW*
HONEYWELL DR4312-AAEE-SA1?00-0000-0000-00?-000 CHART RECO...
HONEYWELL 30356404-002 *NEW IN A BOX*
HONEYWELL DC2500-EE-0L00-?200-10000-00-0 TEMPERATURE CON...
HONEYWELL SKINNER VALVE 71315SN1GNJ1N0C?111P3
HONEYWELL 73419AN2NN00N0C?111P3 *NEW IN A BOX*
HONEYWELL PA404B 1023 PRESSURE CONTROLLER *NEW OUT OF A...
LOT OF 2 HONEYWELL 8MA2 MOUNTING BRACKET *NEW IN A BOX*
HONEYWELL 621-0010-VR *USED*
HONEYWELL GLZ1AA *NEW*
HONEYWELL BAF1-2RN2-LH *NEW*
HONEYWELL MPP1 *NEW IN A BOX*
HONEYWELL RP418B 1071 *NEW*
HONEYWELL LIMIT SWITCH GLDB01A1B *NEW*
HONEYWELL MPB20 *NEW*
HONEYWELL MICRO SWITCH MPB20 *NEW*
HONEYWELL BZE6-2RN-F3 *NICE*
HONEYWELL C7012F1052 *USED*
HONEYWELL L404V1020 PRESSURETROL *USED*
ELECTRO PA222WF HONEYWELL SELF CONTAINED GAUGE SENSOR *...
HONEYWELL PTCF *NEW*
HONEYWELL M9484F 1007 MOTOR (AS PICTURED) *USED*
HONEYWELL 623-3095 OPERATOR INTERFACE PROGRAMING DISPLA...
HONEYWELL 51403165-200 OPERATOR PANEL *USED*
LOT OF 2 HONEYWELL 51305348-100 FLAME SAFETY *USED*
HONEYWELL 80571 CIRCUIT BOARD *USED*
HONEYWELL GSAA01A1B SWITCHES FOR AUTOMATION *NEW OUT OF...
HONEYWELL INPUT MODULE 621-1101RC (AS PICTURED) *USED*
HONEYWELL 1PB43 *NEW*
HONEYWELL M740A1079 120V PROPORTIONING ACTIONATOR MOTO...
HONEYWELL DR4200GP2-00-GG?00000 CHART RECORDER *USED*
HONEYWELL DC3002-0-20A-1-?00-0111 TEMPERATURE CONTROLLER...
HONEYWELL GLDA01A4J *NEW*
LOT OF 2 HONEYWELL LSH1A *NEW IN A BOX*
HONEYWELL Q619A 1006 *NICE*
HONEYWELL 51301874-100 *USED*
HONEYWELL MEMORY BOARD 307-50218 *USED*
HONEYWELL DC230L-EE-00-10?-0A00000-00-0 MINI-PRO *USED*
HONEYWELL DC30EC-0-1A3-21?-0000-0 TEMPERATURE CONTROL *U...
HONEYWELL FE7C-FRU2-M *NEW IN A BOX*
HONEYWELL SPARK IGNITION S87B *NEW OUT OF A BOX*
HONEYWELL R7023A 1005 *NICE*
HONEYWELL Q7800B1003 BURNER MOUNT *NEW OUT OF A BOX*
HONEYWELL GKZ56 SWITCH KEY *NEW IN BOX*
HONEYWELL TP972A 2002 *NEW IN THE BOX*
HONEYWELL SDS-TEE PASSIVE / DIAGNOSTIC TEE *USED*
HONEYWELL 51-52-25-07E *USED*
HONEYWELL MODUTROL IV MOTOR M9185E1019 *NICE*
HONEYWELL MICRO SWITCH BZF2-3AN2-RH *NEW*
HONEYWELL FFSB14R04K-S2 D *USED*
LOT OF 78 HONEYWELL SVP-DILNQ-1 DIFFUSE SENSOR *USED*
HONEYWELL MICRO SWITCH GKBA3L7 *NICE*
HONEYWELL FF-SB14R064-S2 *USED*
HONEYWELL 31745949 *USED*
HONEYWELL L404A1396 PRESSURETROL *USED*
HONEYWELL M9484F1007 *NEW IN A BOX*
HONEYWELL C7027A10232 UV SENSOR *USED*
HONEYWELL U.V. SENSOR C7027A1031 *USED*
HONEYWELL MPW11/ MPL6 PHOTOELECTRIC *USED*
HONEYWELL DC2500-C0-2000-?200-00000-I0-0 *USED*
HONEYWELL GKZ57 SWITCH KEY *NEW IN BOX*
HONEYWELL 923AA2XM-A7T-L SENSING & CONTROL *NEW IN A FA...
HONEYWELL MPB10 MICRO SWITCH BASE *NEW IN A BOX*
HONEYWELL 7121KBN2SV00 SKINNER VALVE 120V *NEW IN A BOX...
HONEYWELL 30756718-002 OUTPUT MODULE *USED*
LOT OF 2 HONEYWELL FE-S2443 *NEW IN A BOX*
HONEYWELL LF2W06N5KB6A *USED*
HONEYWELL DC300K-E-0A3-10?-0000-0-IT TEMPERATURE CONTROL...
HONEYWELL STG644-A1G-0000?0-MB.F1C3-514F TRANSMITTER *US...
HONEYWELL 982AA1Y-A3N -L *NEW OUT OF BOX*
HONEYWELL STF13F-A1A-0T00?0-1C-XXXX *USED*
HONEYWELL S43A10371 SWITCH *USED*
HONEYWELL FF-SB14E08K-S2 *USED*
LOT OF 2 HONEYWELL 2CLSB1T4D CABLE PULL LIMIT SWITCH *U...
HONEYWELL FE7B-FDA6-M *NEW OUT OF BOX*
HONEYWELL 198162EA INTERNAL MOUNT TRANSFORMER 120V *NEW...
HONEYWELL M9184D4009 24V ACTUATOR MOTOR *NEW IN A BOX*
HONEYWELL SKINNER VALVE V52DB2017
HONEYWELL 2CLSB1T4D CABLE PULL LIMIT SWITCH *USED*
HONEYWELL V800A 1070 STANDING PILOT GAS VALVE W/STANDAR...
HONEYWELL HP970B 1015 *NEW IN BOX*
HONEYWELL CW4500 CAL COIL POWER MODULE *USED*
HONEYWELL STF92F-E1A-0R00?0-ZS.F1D3-6138 *USED*
HONEYWELL M9185D4008 24V (AS PICTURED) MODUTROL MOTOR V...
HONEYWELL DR45AT-1000-40-?000-0-B00P00-0 CHART RECORDER ...
HONEYWELL DR4200 CHART RECORDER DR4200GP2-00-BG?-00000 *...
HONEYWELL 922AB2XM-A9P-L *NEW IN FACTORY BAG*
HONEYWELL 31061211-001 *USED*
HONEYWELL V4055A1064 ACTUATOR *USED*
HONEYWELL 621-9950 *NEW IN A BOX*
HONEYWELL 9010-016 LOGIC PROCESSOR *USED*
YAMATAKE-HONEYW?ELL FE3-FD6-P SWITCH *USED*
HONEYWELL DR4501-2000-00-?001-0-00-0111 CHART RECORDER *...
HONEYWELL Q478A1031 CABINET WITH A FACTORY INSTALLED ST...
LOT OF 5 HONEYWELL DUST COVERS 221729A *NEW*
HONEYWELL 3045A *USED*
HONEYWELL IPC 623-30
HONEYWELL SDS-C2-D2CM-1 *NICE*
HONEYWELL LSA7L *NEW IN A BOX*
HONEYWELL 914CE19-3 *NICE*
HONEYWELL LSYCC3KY-FP *NICE*
HONEYWELL DEFINITE PURPOSE CONTACTOR R8243B1005 *NEW*
HONEYWELL M640A1147 ACTUATOR MOTOR *USED*
HONEYWELL MPT21HD *NEW IN A FACTORY BAG*
HONEYWELL R8225A 1017 24V FAN RELAY *NEW IN A BOX*
HONEYWELL SKINNER VALVE V53DB1150
HONEYWELL DC3002-0-30A-1-?C3OO-O11 *USED*
HONEYWELL LSZ1EC LIMIT SWITCH *NEW IN A BOX*
HONEYWELL THERMOCOUPLE HEAD 51500767-006 *NEW*
HONEYWELL L404V 1020 PRESSURETROL OIL *NEW IN A BOX*
HONEYWELL CHART RECORDER DR4200EV2-00-JP?K0000 *USED*
HONEYWELL STG644-A1G-0000?0-00.F1D3-634F TRANSMITTER *US...
HONEYWELL CONDUCTIVITY CELL 04905-X10-33-33?3-X7-000-000
HONEYWELL IC510AC *NEW*
HONEYWELL DR4302-0000-G01?00-0000-0000-00?-000-E0 *NEW O...
HONEYWELL L404A 1404 *NEW OUT OF A BOX*
LOT OF 2 HONEYWELL LSZ1F *NEW*
HONEYWELL RP913A-1008-2 *NEW IN THE BOX*
HONEYWELL LINE VOLT THERMOSTAT T451B-3004 *NEW IN BOX*
HONEYWELL NJ4W-N4 120V *NEW IN A BOX*
HONEYWELL 621-1101RC INPUT MODULE *NEW IN A BOX*
HONEYWELL RM7890A 1031
HONEYWELL T991A 1244 TEMPERATURE CONTROLLER *NEW IN A B...
HONEYWELL 982FS0.8-A3N-G-?L PROXIMITY SWITCH *USED*
HONEYWELL 621-9949 *NEW IN A BOX*
LOT OF 10 HONEYWELL BZ-2RD *NEW*
HONEYWELL Q477A 1009 *NEW IN A BOX*
HONEYWELL LSZ1H *NEW IN A BOX*
HONEYWELL R485B 1018 PROTECTORELAY *NEW*
HONEYWELL DC330B-KE-200-2?1-0000000-20-0
HONEYWELL UDC5000 ULTRA-PRO DC5067-0-0C02-3?30-00-0211 *...
HONEYWELL UNIT THERMOSTAT T6031F 1010 *NEW*
HONEYWELL T6031J 1003 CHANGEOVER THERMOSTAT *NEW*
HONEYWELL GKBA14LX SAFETY INTERLOCK SWITCH *NEW OUT OF...
HONEYWELL DC3200-CE-100R-?310-00000-E0-0 TEMPERATURE CON...
豫公安備 41010502000017號