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在经过若干年的研究后，目前很多工程师形成了一个暂时的共识，那就是：根据现场的实际情况选择分布还是集中，很多情况下一种整体分散局部集中的方式是适合的。比方在冶金行业，很多现场使用S7-400做为主站，用S7-300做为子站，把子站分布在现场，每个子站负责一个具体的任务或者一个工段。这样一方面当网络出现问题时，各个子站可以很好的处理自己的任务，同时每个子站到设备的距离减至了100米以内，使布线和维护变得相对简单了。
现场总线的技术浪潮中有一个很有意思的情况，那就是IEC61158的制定过程，这个过程充分的反应了国际工控业各大利益集团的冲突，大家为了保护自己的利益在长达15年的时间内竟然未能达成一个真正有意义的协议，后的结果是变成了8种标准并存，后来又扩到了13种（有14种标准，但有一种退出了），标准的范围也从初的涵盖过程、楼宇、电力等退到了只包含过程控制，这次争论的结果是当时的制定**的负责人在标准通过的当天宣布辞职，他说：“太多的标准意味着没有标准”。其实我个人认为做一个统一的标准包含所有行业目前来看不太现实，各个行业的关注点也不同，像一般过程控制大家可能选PROFIBUS等，楼控可以选LONWORKS，数采和单一设备间通信可以选MODBUS等。但同一行业内实在应该制定一个统一的标准，我们很多工程师都会常常为了用V80联西门子或者AB的控制系统而伤脑筋。
EK2-20-18mm & 24mm bores R+W servomax coupling metal
3EF-50 Mains Filter KOLLMORGEN SEIDEL USED
6SM71-M-3000-G bless servomotor 22Nm, 600V SEIDEL
Digifas 7108-L2-DP servo amplifier for Profibus SEIDEL
Digifas 7116-L2-DP servo drive with Profibus SEIDEL
Digifas 7133-L2/DP servodrive with Profibus SEIDEL
KK14 ROTEX coupling with 2x 10mm bores metal GS14 KTR
Servostar 601 digital servo amplifier Kollmorgen-Seid?el
R60WKSMB motherboard for Kollmorgen Seidel 60WKS drive
F65WKSMB motherboard for Kollmorgen Seidel 65WKS drive
GS38/45 ROTEX metal coupling with 2x 24mm bores KTR
GS28/38 ROTEX metal coupling with 2x 24mm bores KTR
SKA.DDR.PP.090 direct drive motor NEW Motor Power Co.
AKM41E-GCPNC-00 Kollmorgen motor with C-926201 cable
DRS61-E4A08192 programmable incr. encoder NEW 10-32V
DRS61-A1A08192 programmable incr. encoder NEW 5V TTL
6SM100 K-3000-G-J servomotor Kollmorgen Seidel 6SM 100
EPL84 gearbox ratio 5:1 made by EISELE
6SM71-K-3000-G-?J servomotor Danaher Seidel 6SM 71
F60WKSMB motherboard for Kollmorgen Seidel 60WKS drives
R03SMB motherboard for Seidel 03S drives
SAC-SW217/EP ServoWire drive made by ORMEC
Digifas 7108 digital, high-performanc?e servo amplifier
SBL5-1200-30-3-?560/VS-B bless servo motor
MAC-G080A2/E2 bless servo motor
GS19 ROTEX metal coupling with 2x19mm bores KTR Germany
SL30-13FH drive made by Westamp Inc.
SM100 K-3000-G-J bless servomotor Kollmorgen SM 100
B56F4S3H7A05205?5 LAFERT Servo Motor 2.4Nm, 3000rpm
EP 120/1C planetary gearbox ratio 10:1 made by TRAMEC
Item title
N56WKMB motherboard for Seidel 56WK power supply
F64WKSMB motherboard for Kollmorgen Seidel 64WKS drives
SM100 K-2000 bless servo motor Kollmorgen-Seid?el
SM 56-M 2000 bless servomotor Kollmorgen-Seid?el
SM56 M-2000-J bless servomotor Kollmorgen Seidel
Servostar 446M-S digital servo drive by Danaher
02S-M30/5-PB DC Servodrive, 5A, 30Vdc made by Seidel
6SM37-M-6000-G Brushless Servomotor Kollmorgen-Seid?el
Mini-S Control Terminal made by ICN in France
PBX-ES1 output module made by ICN in France
ACR 8020/PS/E4/D4/S?4/A8/1/0 Acroloop motion controller
PBX-ES2 output driver card made by ICN in France
M21NRXA-JDN-NS-?00 Powermax II stepper motor 55W 1500rpm
PBX-R2-7.5 indexer card made by ICN in France
PBX-R2-1.5 indexer card made by ICN in France
SKPD 24/7 ( 631716 ) Murrelektronik drive card holder
EK6-20B Elastomer coupling rated at 21Nm / 19,000 rpm
MDRM 24/8 BHLS 24V DC digital servo amplifier Mattke
M51-315 motion control module made by SEI spa in Italy
M51-317/1 mini PC personal controller made by SEI spa
CRT Eurocard chasis with 5"monitor made by SEI Italy
M51-315 motion control module made by SEI in Italy