描述
PLC以开关量方式控制变频器的硬件连接如下图所示。当PLC内部程序运行使Y001端子内部硬触点闭合时，相当于变频器的STF端子外部开关闭合，STF端子输入为ON，变频器启动电动机正转，调节10、2、5端子所接电位器可以改变端子2的输入电压，从而改变变频器输出电源的频率，进而改变电动机的转速。如果变频器内部出现异常时，A、C端子之间的内部触点闭合，相当于PLC的X001端子外部开关闭合，X001端子输入为ON。
MOTOROLA MOSCAD NFM XC RTU 48DI F4551 +3* PHONE BLOCKS!
DELL POWEREDGE T710 E5520 QUAD CORE 2.26GHZ 12GB UCP-61
RIVERBED SHA-06020 STEELHEAD MODEL 6020
ALCATEL NEWBRIDGE 7570 90-7570-02 2P OC12C/STM4 IR I/O
CISCO ONS 15454-PP2-64-LC 2RU 64 PORT PATCH PANEL NEW!!
ALCATEL LUCENT 90-3598-45 7470 BAUIABXFAA DSC NEW REFUR
CISCO SYSTEMS CRS-16-LCC-FAN-TR ROUTER FAN ASSEMBLY!!!!
CISCO AIR-LOC2710-L-K9 2710 WIRELESS LOCATION APPLIANCE
ALLEN BRADLEY POWER FLEX 700S 3 PHASE AC DRIVE, 75HP
DELL CUSTOM SERVER 8TB SATA 8*QC 2.5GHZ SLARP 64GB RAM!
JUNIPER NETSCREEN ISG 2000 +2* FE8 5VSYS 8/44/2000
BLUECOAT AV810-A 810 PROXYAV ANTIVIRUS WEB APPLIANCE!!!
CALDIGIT HDPRO DISK RAID TOWER 8* 1TB HARD DRIVES NEW!!
ALCATEL 3HE00229AB IOM-7450 ESS 20GBPS IN/OUT MODULE!!!
CISCO CTS-CODEC-SEC TELEPRESENCE SYSTEM 3000 NEW NIB!
SUPERMICRO 6026T-URF DUAL QC E5520 12GB DDR3 8TB 8*1TB
