当900G32-0001 的用户程序要保留在RAM中时，就会用到电池，电池通常是3V或3.6V的不可充电的锂电池，电池的使用寿命通常是五年左右，电池用久了，电压就会下降，当其下降到不足以保证RAM中数据时，RAM中的程序就会丢失。如果用户没有备份程序，就会相当麻烦。

一般PLC内部设有电池电压检测电路，当电压下降到一定程度时，PLC就会报警，提醒更换电池。PLC的使用说明书都有提供更换电池的方法。一般来 说，PLC在断电后，因为PLC上RAM电源端接有充电电容，即使把电池去掉，电容上充电电量也足够RAM内的数据保持一段时间，所以如果取掉电池后在短 时间内（通常5分钟）再将新电池换上去，数据是不会丢失的。

但用户实际使用PLC的环境情况不尽相同，例如电容的容量下降，RAM电源回路有 灰尘、油泥等形成放电回路等，这会加快PLC断电后电容的放电速度，从而使时间不好把握。如果在带电的情况下更换电池就可保程序万无一失。因为电源始终会 有电压加在RAM芯片的电源脚。当然更换时亦要小心应对，注意电池的极性以及避免短路情况发生。

是把PLC通电15分钟（给内部电容充电），断电，在5分钟内换好新的电池，再上电试一下。

西门子PLC有带卡的，有不带电池的；也有带卡的，带电池的。程序存在MMC卡中，如果没有存储卡，需要电池保存程序的，更换电池时候务必注意，带电的情况下，将旧电池取出来，然后将新电池换上即可。

 

 

SMC 150PSI PNEUMATIC CYLINDER T-ACNL-80-01-00?10US

 

NUMATICS SOLENOID VALVE I34RD100J053G

 

PARKER 63mm BORE 120.7mm PNEUMATIC CYLINDER 63 CTMPRVS14MC 120.7

 

SMC 145PSI PNEUMATIC CYLINDER T-ACNL-80-01-00

 

NUMATICS 120V, 0.30AMPS, SOLENOID VALVE 554SS43CJ

 

MAC 150PSI 2.5WATTS SOLENOID VALVE PME591AAAA

 

TOYODA MACHINE HYDRAULIC CYLINDER HC-40CB215-W-L

 

SMC PNEUMATIC CYLINDER 63MM BORE 150MM STROKE CKGA163-150Y

 

NUMATICS DOUBLE ENDED PNEUMATIC REGULATOR NIB 123RQ100JP00000

 

NUMATICS 150 PSIG SOLENOID VALVE 134BA400KP14D30

 

NUMATICS SOLENOID REGULATOR VALVE W/ BASE, I35RD115J000000

 

WELKER BEARING COMPANY 250PSIG 63MMBORE 50MMSTROKE PNEUMATIC CYLINDER WCP-027

 

NUMATICS 150PSIG-AIR SOLENOID VALVE I34BB515MP00061

 

PARKER 14N73-32-32 SAE CODE 61 FLANGE HEAD 90 ELBOW

 

NUMATICS 120V, 50-60HZ, 0.16AMPS SOLENIOD VALVE 34DXP4460

 

NUMATICS SERIES ISO5599/11 SOLENOID VALVE I23BB400MP

 

FESTO 145PSI PNEUMATIC CYLINDER DRQD-25-90-PPV-?J-A-AL-ZW

 

SMC CYLINDER CDNAF50N-150H-D?-J59W W/CNA50ND-UA

 

LUBRIQUIP DIVIDER VALVE MSP-151 H006

 

UNKNOWN MANUFACTURER * SCH 40 PIPE NIPPLE * 304/40

 

FESTO 32mm BORE 125mm STROKE PNEUMATIC CYLINDER DNG-32-125-PPV-?A

 

NORGREN 400PSIG INLET 50PSIG OUTLET REGULATOR 11-002-021 103723

 

FESTO 20MM BORE 25MM STROKE PNEUMATIC CYLINDER, DSNU-20-25-PPV-?A, NNB

 

FESTO CONNECTOR CABLE, 159424 PNP, NNB

 

NUMATICS 150 PSIG-AIR PNEUMATIC SOLENOID VALVE, I34BB400KP

 

HYSON 160 MM STROKE, 130 BAR NITROGEN GAS SPRING NP-750-160 SW

 

FIBRO GSA 73169 02310 PNEUMATIC ROBOTIC GRIPPER 52.81.500

 

ST * METRIC 90 ELBOW * UNKNOWN

 

BIMBA DOUBLE WALL ROD END PNEUMATIC CYLINDER CDW-01828-A-18

 

RACINE VARIABLE VOLUME SILENT VANE PUMP PSV DNS0 20HRS 11

 

SMC 145 PSI 1.00 MPA PNEUMATIC CYLINDER, US23700

 

NUMATICS VALVE 225-285B 24VDC 6.3 WATTS

 

NUMATICS 120V 0.30A 60HZ 150 PSIG-AIR PNEUMATIC SOLENOID VALVE, I34SS500K

 

IAI LARGE DIAMETER HOLLOW ROTARY GRIPPER ASSEMBLY

 

NORGREN GRIP-LOK GRIPPER AW 789 PO

 

FESTO LINEAR GUIDE FEN-63-200 NNB

 

UNKNOWN MANUFACTURER * ASSORTED WEATHERHEAD 90 ELBOW * UNKNOWN

 

NUMATICS REGULATOR VALVE 554RD100J000000

 

FHAC GX11 HYDRAULIC MOTOR/PUMP 9G D23 01

 

PALL MODEL 8670 DUPLEX FILTER ASSEMBLY HH8670D20 UB T 104656

 

NUMATICS 150PSIG, 120V, .16A, 50/60Hz SOLENOID VALVE 554BB500K

 

ADVANCE * CYLINDER REPAIR KIT NIB * I325-00NL

 

NORGREN 250PSI PNEUMATIC LUBRICATOR L17-800-OEDA

 

MAGNETROL PD43L38Y 60W 120V SOLENOID VALVE

 

HYTORK 1125 ACTUATOR W/ ACCUTRAK POSITIONER 1040N 103548

 

PARKER 1000KPA SOLENOID VALVE F72VXBG019A

 

MILLER HEAVY DUTY AIR CYLINDER AV-72BXN -08.00-40.00-01?38-N11-0

 

MAC 24VDC 6.0W 150PSI SOLENOID VALVE 130B-501BA

 

NUMATICS 150PSIG .31A 115V PNEUMATIC SOLENOID VALVE 33SAD441A 103353

 

SMC PNEUMATIC MICRO MIST SEPERATOR REGULATOR AWD20-01B

 

FESTO 50MM BORE 200MM STROKE PNEUMATIC CYLINDER, DNU-50-200-PPV-?A

 

LUBRIQUIP TRABON .150 TWIN OUTLET DIVIDER VALVE, MXP-150T

 

NUMATICS 24 VDC, 4.0 WATTS SOLENOID COIL, 236-312B

 

BEHRINGER CORPORATION BE60P40AH HYDRAULIC FILTER, NIB

 

FESTO 40MM BORE 170MM STROKE PNEUMATIC CYLINDER, ADVU-40-170-PA, NNB

 

PARKER 10671-32-32 FEMALE JIC 37 SWIVEL

 

BIMBA PNEUMATIC CYLINDER 042-DZ YG

 

VERSA 120V 75PSI SOLENOID VALVE ESM 8012 66 Z CLL36

 

FESTO DGPL-63-500-PPV?-A-GF-B

 

NUMATICS 123BA400K 120 VOLTS 50/60 HERTZ 150 PSIG SINGLE SOLENOID VALVE, NNB

 

ENERPAC AIR HYDRAULIC BOOSTER AHB46

 

NUMATICS 150 PSIG-MAX SOLENOID VALVE ISO5599/11

 

SMC NCDBN32-XA-0065?US AIR CYLINDER, NNB

 

NUMATICS F30B-04CE PNEUMATIC VALVE, NIB

 

FESTO PNEUMATIC LINE GUIDE FEN-50-80-KF NNB