状态继电器是PLC在步进顺控系统实现控制的重要内部元件。它与步进顺控指令STL组合使用，运用状态转移图，编制高效易懂的程序。状态继电器一般分为四类，其编号及点数如下：
初始状态：S0∽S9(10点)；
回零：S10∽S19(10点)；
通用：S20∽S499(480点)；
保持：S500∽S899(400点)；
报警：S900∽S999(100点)；
MIRANDA SYMPHONIE X2 ADA-101I X 3 ADA-702I -T
TRANSISTOR DEVICES DLP 50-60-1000A ELECTRONIC LOAD
ZEBRA 170XIIII 170 XI III THERMAL PRINTER 300 DPI 170-1...
KINETIC SYSTEMS BENCHMATE 2212 VIBRATION-FREE BENCH PLA...
ILX LIGHTWAVE MPS-8024 1310.0 & 1550.0 NM FIBER OPTIC S...
SORENSEN DCS8-350 DC POWER SUPPLY 8V 350A DCS 8-350 M9C
LEYBOLD TURBOVAC 150 TURBOMOLECULAR VACUUM PUMP 150 LIT...
NATIONAL INSTRUMENTS NI PXI-4070 6?-DIGIT DIGITAL MULTI...
FW BELL MA-2000 CLAMP-ON MILLIAMMETER DC TO 100KHZ
OPTISPEC ME2506 MICROSCOPE INSPECTION SYSTEM & KP-M1U
UDT S2575 & 2575 SENSOR MINISPHERE COMBINATION
HP AGILENT W365A 75 - 110 GHZ 25 DB WAVEGUIDE ISOLATOR
SETRA 4091321NN SUPER II DIGITAL PROGRAMMABLE SCALE
HP AGILENT 37717B COMMUNICATIONS ANALYZER USS 706 707
PTS 200 S601G FREQUENCY SYNTHESIZER 200 MHZ PTS200 ~ 25...
TEKTRONIX 012-1569-00 SAMPLING MODULE EXTENDER CABLE 2M
FORE MARCONI NM-4/E3D 4 PORT E3 NETWORK MODULE
TEKTRONIX CSA803 CSA 803 COMMUNICATIONS SIGNAL ANALYZER
LUXO 23711 BINOCULAR ZOOM MICROSCOPE WITH BOOM STAND
ORIEL NEWPORT 70328 PHOTOVOLTAIC DETECTOR
LEITCH SPG-2602N W/ 5X VSM-1344 VIDEO ROUTING SWITCHER
NEW OLYMPUS 3977600 LM PLAN FI 20X/0.40 OBJECTIVE LENS
SPECTRACOM 8144-RD CLOCK SELECTOR DISTRIBUTION AMP
TEKTRONIX TDS520 DIGITAL OSCILLOSCOPE 500MHZ 500MSa/S
HP AGILENT 81662A DFB LASER SOURCE +10 DBM ~ 8163A 8166...
HP AGILENT 37717B COMMUNICATIONS PERFORMANCE ANALYZER
IET SRL-10K OHMS RESISTANCE STANDARD HIGH ACCURACY
HP AGILENT 85131E 26.5 GHZ TEST PORT CABLE
ANRITSU MA2491A WIDEBAND POWER SENSOR 50 MHZ TO 18 GH
PELCO DX4508CD-250 DVR DIGITAL VIDEO RECORDER 250GB 8CH
LORAIN VORTEX V50B50 48VDC 50A POWER RECTIFIER
NI NUDRIVE-25X-411 4-AXIS MOTOR CONTROLLER POWER AMPLIF...
ANRITSU MP0111A 156 622M 1310NM OPTICAL MODULE OC-3 12
KLINGER SERRE LIBRE MC SINGLE-AXIS LIFT STAGE NEWPORT
HP AGILENT 85134F FLEXIBLE CABLE SET 2.4MM TO 3.5MM
HP AGILENT 16442A TEST FIXTURE FOR 415XX 4155C
EXFO IQ-3200 IQ3200 RETURN LOSS METER 1250 - 1650 NM
SCHLEUNIGER CC-15 GRIP TECH COMPONENT COUNTER
HEPCO C-7600 DIP LEAD CUTTER C7600
HP AGILENT 11667B DC TO 26.5 GHZ POWER SPLITTER
KIKUSUI PAD55-10L REGULATED DC POWER SUPPLY 55 VOLTS @ ...
HP AGILENT 81536A OPTICAL POWER SENSOR FOR 8153A 8163A ...
LAMBDA LZS-1500-3 DC POWER SUPPLY LZS SERIES LZS1500-3 ...
LEYBOLD HERAEUS TURBOTRONIK NT 450 TURBO PUMP CONTROLLE...
AEFOS AFXM-USB FERRULECAM FIBRE OPTIC VIDEO INSPECTION ...
ADC BJF303-4MKII BANTAM PATCHBAY UP-96NMKII AUDIO PATCH...
SORENSEN XANTREX DCS8-125E DC POWER SUPPLY RS-485 WITH ...
NEW NEWPORT 763H SERIES HIGH POWER LASER DIODE MOUNT
ACTERNA WANDEL W&G PCM-4 PCM4 CHANNEL MEASURING SET 98...
OLYMPUS M PLAN 100X 0.90 MICROSCOPE OBJECTIVE MPLAN 100...
PARKER DAEDAL CR4421-L PRECISION LINEAR XY STAGE
PROGRAMMED TEST SOURCES PTS 200 FREQUENCY SYNTHESIZER M...
HP AGILENT 81532A OPTICAL POWER SENSOR MODULE FOR 8153A...
AGILENT HP 346B 18GHz NOISE SOURCE 18 GHz APC 3.5 mm
AGILENT HP 346B 18GHz NOISE SOURCE 18 GHz 001 Type N
AGILENT HP 346B 18GHz NOISE SOURCE 18 GHz APC 3.5 mm
AGILENT HP 1154A 500 MHz DIFFERENTIAL PROBE
AGILENT HP 346B 18GHz NOISE SOURCE 18 GHz APC 3.5 mm
NEWPORT 462-XYZ 462 XYZ LINEAR MOTION STAGE ULTRALIGN
