模塊支持S7-200的MODBUS協(xié)議庫(kù)的相關(guān)命令。CPU編成時(shí)只涉及MBUS_CTRL和MBUS_MSG兩條指令。
MBUS_CTRL用來(lái)初始化CPU的串行口，mode=1將串行口分配給MODBUS接口，mode=0將串行口分配給PPI接口；parity=0，設(shè)置無(wú)校驗(yàn)；baud=19200，設(shè)置串行口的波特率為19200bps；timeout=1000，設(shè)置通訊等待時(shí)間最多為1秒。
MBUS_MSG用來(lái)輸出MODBUS請(qǐng)求命令（發(fā)出數(shù)據(jù)采集命令），EN和First均接通時(shí)啟動(dòng)MBUS_MSG命令；slave用來(lái)指明S7-EM239模塊的地址；RW=0，指明該命令是讀數(shù)據(jù)命令；addr=30001指明讀取數(shù)據(jù)從S7-EM239模塊的1通道開(kāi)始；count=16代表連續(xù)讀取16個(gè)通道數(shù)據(jù)（對(duì)S7-EM239模塊可以是1~16間的任何數(shù)）；Dataptr指明讀取數(shù)據(jù)存放地址的指針。
參見(jiàn)《MODBUS協(xié)議及自由口通訊》及《S7-200可編程序系統(tǒng)手冊(cè)》。
一線(xiàn)通模塊設(shè)置CSB Self Aligning Ball Bearing 1303 New
Torrington Needle Bearing B-107 B107 New
INA HK 2530 2RS Needle Bearing HK25302RS New
Peer Insert Bearing FHR204-12 FHR20412 3/4" Bore Locking Collar New
Timken L44610 Tapered Roller Bearing Cup LOT OF 2 New
Fafnir Shielded Ball Bearing 210PP New
NEW SST BEARING 3038ZZTN
NEW FAIRLANE ROLLER BEARING RR-2020 1"BORE
NEW FAFNIR GC1106KRRB INSERT BEARING W/COLLAR
NEW NACHI BEARING 6200-2NSE9 62002NSE9 6200NSE C3 6200NSEC3
NEW BEARINGS LIMITED MS8 2RS RMS6-2RS BEARING MS82RS RMS62RS
NEW KLIXON OVERLOAD MOTOR PROTECTOR MRA5782-34 MRA578234
MRC Shielded Ball Bearing 202SFF5 New
NEW BROWNING INSERT BEARING SLS-112 SLS112 3/4"
INA Needle Bearing RNA 4908 RNA4908 48X62X22MM New
NEW INA Bearing KBZ08
NEW JAF BEARING 2203-2RS 22032RS
MRC Single Row Ball Bearing Sheilded One Side R8Z New
NEW NSK 22213CDKE4C3 SPHERICAL ROLLER BEARING 22213CDKE4C3S11 22213CDE4C3S11
NEW MRC BEARING 206SG
NEW NICE BEARING 1630DS
NEW MRC BEARING 203 SF 203SF
NEW NSK LINEAR GUIDE BEARING LAH35EM
MRC Single Row Ball Bearing 106KS H501 New
NEW ELGES BEARING GE 19 ZO GE19ZO
NEW FEDERAL MOGUL BEARING M 88048 M88048
NEW BCA BEARING 203RRAR10
NEW NO NAME BEARING 1630-Z 1630Z
Sealmaster Seal Master Spherical Roller Ball Bearing COM-12 COM12 New
RBC NEEDLE BEARING SJ 7294 I SJ-7294-I SJ7294I NIB
NEW HUB CITY 0223-01932-180 REPAIR KIT 022301932180
NEW SKF BEARING 6201 6201-2ZJEM 62012ZJEM
NICE BEARING 1604 DSTN 1604DSTN NIB
NEW NICE BEARING 3028DS
Torrington Cam Follower Bearing CRS-20 CRS20 New
SKF Angular Contact Bearing 7207 BECBY 7207BECBY New
PTI TAPPED BASE PILLOW BLOCK BEARING SWG203 17MM SWG15
NEW KOYO 453X-N TAPERED BEARING RACE
NEW IKO CAM FOLLOWER BEARING CR 12 BUU CR12BUU
NEW THOMSON BALL BUSHING LINEAR BEARING SUPER 4
Federal Mogul Tapered Bearing 21075 New
NEW MRC BEARING 113KSFF 0011 113KSFF0011
NEW FYH UC-205 INSERT BEARING UC205
NEW INA NEEDLE BEARING NCS 1416 NCS1416
Rexnord Industries KLFXSS216DC Flange Bearing KLFXSS 216 DC New
NEW RHP 1035-1 3/8 G INSERT BEARING 1035138G
NEW TIMKEN FAFNIR SUPER PRECISION BEARING 2MM212WIDUL d-3 ID D-4 OD
NEW DODGE 059066 TYPE E FLANGE BEARING 1-15/16" 367DEE
NEW SNR SEALED BEARING 5303 ZZ 5303ZZ F35
NEW KOYO BEARING ASSEMBLY 11205-08 1120508 OUTER RACE 25821 BEARING 25877R
NEW SKF BEARING 6204-Z 6204Z
NEW SKF BALL BEARING 6012 2RS1 60122RS1 HT 51
No Name Bearing Adapter Sleeve H209 New
DODGE SX 2 BOLT FLANGE BEARING LA200A 131081 NEW 2" BORE
NEW FAFNIR PILLOW BLOCK BEARING PB 3/4 PB34 3/4" Bore
NEW NKB MOUNTED BEARING INSERT UC 207-20 UC20720 UC207-20 J
INA RCJ 1-3/16 Flange Bearing RCJ1316 RCJ 1-3/16" New
NEW NICE SINGLE ROW BEARING 1623DSTN 1623 DSTN
BIMBA MRS-041.5-D STAINLESS S/S 5 3/4" - 7 1/4" AIR PNEUMATIC CYLINDER NEW
SKF Explorer Bearing 6305 JEM 6305JEM New
NEW TIMKEN BREAKING RACE M802011
Torrington Cam Follower CRSB 24 CRSB24 New
INA NEEDLE BEARING SCE1612 NIB
NEW TIMKEN TAPERED ROLLER BEARING 19268
NEW TIMKEN OUTER BEARING RACE 1931
HBC UC201-8 Insert Bearing UC2018 1/2" Bore New
FAFNIR BEARING 9105KDD NIB
IJK Ball Bearing 7001A 30516 7001A30516 7001A New
Link-Belt Bearings F3W228U Flange Bearing F3W228U 1-3/4" New
SKF 7315 BY 7315BY BALL BEARING NEW
Fafnir 2MM9102WI CR DUL Super Precision Ball Bearing Set 2MM9102WICRDUL New
NEW SKF CYLINDRICAL ROLLER BEARING NU 304 ECP NU304ECP
MRC Double Row Ball Bearing 5303SB New
No Name Shielded Ball Bearing 6208Z New
NEW JAF BALL BEARING 5304-2RS 53042RS
MCGILL NEEDLE ROLLER BEARING MR-24-S MR24S NIB
NEW MRC BEARING 208S ABEC-1 ABEC1 208SABEC-1 208SABEC1
NEW NDH BEARING 5204
NEW TIMKEN FAFNIR 2 BOLT FLANGE BEARING W/COLLAR VCJT 5/8 GRA010RRB
NTN UCFL208G-6D1 UCFL208G6D1 40MM BORE 145MM BOLT PATTERN FLANGE BEARING NEW
Precision Consolidated Roller Ball Bearing 2201 NEW
Torrington Needle Bearing B-136 B136 New
Schatz WE512 Ball Bearing WE-512 New
NEW NO NAME FLANGED BEARING 6202RS
MRC Bearing 104KSZZG H401 NEW
NEW MRC BEARING 109KSZZG 0009 C3 109KSZZG0009C3
FAFNIR BEARING 208KDD 208KDD C2 208KDDC2 NIB
WEATHERHEAD COLL O CRIMP T-420 SUPER I T-420-D 3/16" - 1 3/8" HOSE CRIMPER NEW
FAG Bearing 6205 C3 6205C3 New
NEW NICE 1628 BEARING
SKF Tapered Roller Bearing 39581 New
TIMKEN TAPERED ROLLER BEARING NA05076SW NA05076SW-20024 NA05076SW20024 NIB
NEW SKF BEARING 6206-RSJEM 6206RSJEM 6206-RS1/C3 6206RS1C3
NEW JAF 5206ZZ METAL SEALED BEARING
NEW SNR SELF ALIGNING BEARING 1212 F25 1212F25
NTN Flange Bearing With Collar FL207J 1-7/16" bore New
SKF Locknut Lock Washer MB32 MB 32 New
NEW FAG DEEP GROOVE SINGLE ROW BEARING 6210K
WTW Sealed Rubber Bearing 6304RS 63042RS New
Sealmaster Insert Bearing S-A-SK-2775 S-A-SK-2775 SK2775 New
No Name Adapter Sleeve H2312 New
NDH BEARING Z499501 NIB
NEW GMN ANGULAR CONTACT BEARING S 6204 C TA HG R S6204CTAHGR S6204
NEW SKF BEARING 1307
NEW BARDEN BEARING SFR6SS
NEW NDH BEARING 600
NEW NTN BEARING R6 ZZC3/L627 R6ZZC3L627
ENDURO INSERT BEARING CSA204-12/hsg CSA20412hsg CSA204-12 CSA20412 NIB
Nachi Shielded Ball Bearing 63/32Z 6332Z New
NEW FAFNIR 304PP BEARING 304-PP
NEW NDH BEARING 5308 5608
NEW SCHATZ BR 9921 BEARING BR9921
Timken Tapered Roller Bearing Set Cup and Cone 2729 2786 2729/2786 New
NO NAME 22217CAKC3W33 SPHERICAL ROLLER BEARING NEW
Seal Master Ball Bearing Insert L-10 New
NEW TIMKEN TAPERED ROLLER BEARING W/RACE 32206 91H50 X-32206 32206
NEW NACHI BEARING 607 2NSL BV2M 6072NSLBV2M 551 607NSL
SKF Pillow Block Bearing SY 3/4 FM SY34FM 3/4" Bore New in Box
NEW MRC BEARING 212S
SKF SPHERICAL ROLLER BEARING 22309 E/C3 22309EC3
NEW SNR 1203.G15 SELF ALIGNING ROLLER BEARING 1203G15
NEW FAFNIR BEARING 9102PP
New Bearing VS-123 VS123 W123
NEW NICE BEARING 1616DS
INA Cam Follower Camfollower KR 19 KR19 New
Timken Tapered Bearing Outer Race 28622 New
Consolidated Cam Follower FAG NUKR-47 X FAGNUKR47X New
SKF Explorer Single Row Rubber Sealed Ball Bearing 6010 2RSJEM 60102RSJEM New
NEW KOYO BEARING 62062RDC3 62062RDC3
NEW NTN RUBBER SEAL BALL BEARING 7205C
NEW MRC 206SFF BEARING 206SFFH201C3
NEW FAG BALL BEARING 6201ZR-C3 6201-ZR-C3 6201ZRC3
TIMKEN CAM FOLLWER BEARING CRS-18 CRS18 NIB
NEW SKF BALL BEARING 626 2RSJEM 6262RSJEM 626-2RS1/+20
NEW AMI ASAHI PILLOW BLOCK BEARING P204 UC204
Koyo Hi Cap Tapered Roller Bearing LM11949 New
NEW Hyster Shielded Ball Bearing 0124642
NEW SKF EXPLORER BEARING 6208-2RS1/C3 62082RS1C3
NEW NO NAME THRUST BEARING NTA-2840 NTA2840
NEW HIWIN LINEAR GUIDEWAY BLOCK BEARING EGW20C EG20 EG20C EGW20CC
INA KBO-2045-PP KBO2045PP KBO 2045 PP LINEAR BALL BEARING NEW
NEW PEER BEARING SER-12 SER12
NEW FAG SPLIT SPHERICAL BEARING 222SM80T
NEW AETNA PRECISION BEARING E-9 E 9 E9
FAFNIR G1104KRRB FLANGE BEARING C1 NEW
STEYR AUSTRIA BALL BEARING 2nu16 NU-216 ZS NU216 ZS NEW
HOFFMAN A6648RT 6" X 6" X 48" RAINTIGHT WIREWAY OR AUXILIARY GUTTER FITTING NEW
New SKF Bearing 5316 A/C3 5316A/C3
NEW NDH BEARING L09 L-09 L 09
NEW TORRINGTON YCRJSC-30 BEARING YCRJSC30
WJB HBC CSA205 Ball Bearing CSA-205 New
Ross 4-Way Solenoid Operated Valve 2776B3001Z 2776B3001 110/120V Coil New
Justrite Dual Action Drum Vent 8-005 8005 Non-Metallic New
INA Cam Follower NUKRE 47 A NUKRE47A New
New Departure Delco Shielded Ball Bearing 55605 New
NEW MRC BEARING 205 SFFC 205SFFC
NEW GENERAL BEARING 3041DS
SNR AA17 Bearing AA-17 New
Bower BCA Tapered Roller Bearing 15590 New
NEW THOMSON LINEAR BALL BUSHING XA-81420 XA81420
NEW SKF BALL BEARING 7305 BYG 7305 BG 7305BYG 7305BG
NEW NACHI BEARING 6008NK
NEW SKF BEARING 627 JEM 627JEM
NEW Hyster Bearing Cup 0030016
Martin Sprocket 50BTB19H 50BTB19H 1610 50BTB19H1610 New
(1) SET OF ROCO INC. A 32 PLASTIC BUSHING BEARING A32
NEW SKF 5307 E-2RS/C3 ANGULAR CONTACT BEARING SR 5307
NEW MRC 207SFFG 207 SFFG METAL SHIELD BALL BEARING
NEW FAG BALL BEARING 6207.2RSR.C3 62072RSRC3 6207.C3 6207C3
IKO Needle Bearing BHA 1616 Z OH BHA1616Z New
NEW INA ROLLER BEARING NA 6904 NA6904 6904
General Bearing S8706-88-300 S870688300 7616DLG New
NEW NICE BEARING 1630DC
NEW TIMKEN FAFNIR BEARING 9109PP
TIMKEN TAPERED ROLLER BEARING 30207 92KA1 X-30207 X30207 Y-30207 Y30207 NIB
DELCO NDH BEARING Z993L05 NEW
NEW RHP 1035-1 1/4 G INSERT BEARING 1035114G
IKO Thompson Needle Roller Bearing RNA 4909 RNA4909 New
Timken Bearing Cup 3620 CUP 3620CUP New
MRC 307SZZG BEARING NEW
NEW MCGILL MR-28 BEARING MR28
NEW BOWER/BCA KOYO 414 TAPERED RACE
NEW SKF BEARING 1207 KJ 1207KJ 1207K
NEW FAG ADAPTER SLEEVE H 206 H206 "LOT OF 5"
NEW FAG BEARING 6213 C3 6213C3
NEW KBC 6007ZZC3 BEARING 6007Z
MARTIN SH-1/2 SH 1/2 SHX12 BUSHING NEW NO HARDWARE
NEW SKF 305701-C-2Z BALL BEARING YOKE ROLLER 305701C2Z
NEW NKB Pillow Block Ball Bearing HCAK206-19 HCAK20619
INA Bearing with Collar JELS 205-100 JELS250100 1100KRR New
Asahi 3 Bolt Flange Bearing FB204 UC204 UC204-12 UC20412 New
NEW DODGE TYPE E FLANGE BEARING 059070 2-7/16" BORE
NEW NTN 4T-31521 BEARING RACE 4T31521
SST Sealed Rubber Bearing W206 New
NEW FAFNIR SHIELDED BALL BEARING 210KDD
HBC Rubber Sealed Bearing 60042RS New
RBC INNER RACE BEARING IR-7173 IR7173 NIB
NEW TIMKEN TORRINGTON NEEDLE ROLLER BEARING 12SF20
KBC Bearing 6002DDC3G14 6002D New Lot of 3
NEW NTN BEARING 6204-Z 6204Z
TIMKEN A2047 TAPERED ROLLER BEARING NEW
Timken Bearing Cone 15123 made in USA New
MRC Double Row Ball Bearing 5209CZZ New
NEW MCGILL NEEDLE BEARING MR 20 RSS MR20RSS MR-20-S MR20S
NEW LOT OF 8 NO NAME CONVEYOR ROLLER BEARINGS OD 1.495" ID HEXAGON .472"
INA BEARING SCE46P NIB
New Graco Ball Bearing 101823
NEW SKF BEARING 21315 E 21315E
NEW FAFNIR BEARING 9104 K 9104K
NEW MRC BEARING 102KSZZG
NEW NO NAME BEARING 6202
Sterlco Temperature Control System M2 Used
New MRC Ball Bearing 209MF 209 MF 209-ZTN9 209ZTN9 C209
NEW DODGE P4B-S2-207R PILLOW BLOCK BEARING 2-7/16" 2 7/16" 070365 NIB
NEW RBC BEARING SJ 7275 I SJ7275I
NEW MCGILL INNER RACE BEARING MI-32 MI32
Sealmaster Seal Master Insert Bearing L-12 L12 3/4" Bore New
ANDRE WS D-6 WSD6 BEARING NEW
MRC 300SF ABEC1 BEARING NEW
NEW IKO SPHERICAL BUSHING PLAIN BEARING GE20ES
NEW SNR BEARING 4201A F35
NEW TYSON OUTER RACE BEARING 07196
CONSOLIDATED NEEDLE BEARING MR 142212 MR142212 NIB
NEW NEW DEPARTURE BEARING 3L06
NEW SCHATZ BR9933 BALL BEARING BR-9933
NEW TORRINGTON NEEDLE BEARING B-810 B810
NEW RBC BEARING RACE OR-306 OR306
No Name 283 S Bearing 283S New
FAFNIR BALL BEARING 301KD NIB
NEW TIMKEN TAPERED ROLLER BEARING W/RACE 32206 91850
Schatz W512 Ball Bearing W-512 New
INA Cam Follower NUKR35 New
NEW MRC BALL BEARING 108KS
NEW TORRINGTON INNER RACE IR-1012 IR1012
RBC SJ7194RS SJ-7194-RS BEARING NEW
Asahi 4 Bolt Flange Bearing UC209 F209 New
NEW SKF CYLINDRICAL ROLLER BEARING NU 306 M NU306M 3NU06
FALK HUB 1110T 4.4340 BORE 980B0644
Igus DrylLin T Linear Rail Guide Rail Car TW-01-20 TW0120 New
NEW FAFNIR BEARING 9102PP C4 9102PPC4