EMPII 3006

PLC的基本工作方式是顺序执行用户程序，每一时钟周期执行一条指令。对用户程序的执行一般有循环扫描和定时扫描两种，扫描过程分为三个阶段，即输入采样阶段、程序执行阶段和输出刷新阶段，如图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...