指示灯的含义 见附图：
1、y灯一直亮红灯，bf灯不亮？？
当前存在一个故障
2、PN口未插网线，两个LINK灯均亮绿灯，网络不通，搜索不到设备？
设备正在建立通讯
3、a.CU250S-2PN没有初始IP，需要分配 ，和S120不一样。
b.使用博图进行1200与CU250S-2PN的组态，将CU250S-2PN做现场分布设备，不使用Startdrive进行调试，使用starter调试，在网络组态中对CU250S-2PN的IP进行分配。
发现如果断开1200与CU250S-2PN的链接则CU250S-2PN分配的IP失效，IP回到0.0.0.0 链接上1200则IP恢复，猜测该IP分配需要S7网络链接做支持。
如果使用starter进行IP的分配则不会出现上述现象，IP固定有效。
PM240‑2 Power Modules, frame sizes FSA to FSG (with Control Unitand Operator Panel)
The PM240‑2 Power Modules are based on a new hardware platform.This permits an increase in power density.
Furthermore, the PM240-2 Power Module is also suitable for use insafety-oriented applications. In conjunction with a fail-safeControl Unit, the drive can be transformed into a Safety IntegratedDrive (see section Control Units).
The PM240‑2 Power Modules in frame sizes FSA to FSF are availableboth with and without an integrated line filter class A ofcompact design for 200 V, 400 V and 690 V linevoltages (except PM240‑2 frame sizes FSD to FSF: 200 V). ThePM240‑2 Power Modules in frame size FSG are available with anintegrated line filter Category C3 of compact design for 400 Vand 690 V line voltages, also with integrated line filterCategory C2 for a line voltage of 400 V. In addition, a DClink reactor is integrated in the PM240‑2 Power Modules, framesizes FSD to FSG, and therefore no line reactor is required.
The PM240-2 Power Modules with integrated line filter class Aare suitable for connection to TN supply systems. Power Moduleswithout integrated line filter can be connected to grounded TN/TTsystems and non-grounded IT systems.
The PM240‑2 Power Module has an integrated braking chopper. Ingenerating mode, the excess energy of the DC link can be dissipatedby means of an optional braking resistor.
The permissible cable lengths between converter and motor arelimited (for max. permissible cable lengths, see Integration). Longer cables canbe used if output reactors are connected (see section Load-side powercomponents).
Shield plates and shield connection kits are available for use inthe wiring installation of Control Units and Power Modules toensure that it complies with EMC guidelines.
For more information, see Shield connection kitsfor Control Units and Power Modules in section Supplementary systemcomponents.