FR-A701 INSTRUCTION MANUAL (Applied) - Automation Systems ...

Special operation and frequency control(4) Synchronous speed operation by pulse I/OInverter (master)Pull up To next inverter (slave)resistance*PCJOGSpeedcommandPulse traininputSpeedcommandFMPulse trainoutputFMSDJOGSDPulse trainoutputTo next inverter (slave)SD* When the wiring length between FM and JOG is long, a pulse shape is deformed due to the stray capacitances of the wiring and input pulse can not berecognized.When wiring length is long (10m or more of 0.75mm 2 twisted cable is recommended), connect terminal JOG and terminal PC using an external pull upresistance. The reference of resistance value to the wiring length is as in the table below.Wiring Length Less than 10m 10 to 50m 50 to 100mPull up resistance Not necessary 1kΩ 470ΩLoad current (forreference)10mA 35mA 65mAStray capacitances of the wiring greately differ according to the cable type and cable laying, the above cable length is not a guaranteed value.When using a pull up resistance, check the permissible power and permissible load current (terminal PC : 100mA, high speed pulse train output : 85mA) of theresistor and use them within a permissible range.· By setting "100" in Pr. 291, pulse train input can be output at pulse train output (terminal FM) as it is.Synchronous speed operation of multiple inverters can be enabled by daisy chain connection.· Since maximum pulse train output is maximum of 50k pulse/s, set "125" in Pr. 384 of the inverter receiving pulse train.· When operating two or more inverters synchronously, perform wiring according to the following steps. (so that 24Vcontact input will not be applied to terminal FM)1) Set pulse train output (a value other than "0, 1") in Pr. 291 of the master side inverter.2) Turn off the inverter power3) Perform wiring of the master side terminal FM-SD and slave side terminal JOG-SD4) Turn on the inverter powerCAUTION· After changing a setting value of Pr. 291 , connect JOG terminal between termial FM and SD. Take note that a voltage shouldnot be applied to terminal FM specially when FM output (voltage output) pulse train is selected.· For the slave side inverter, use sink logic (factory setting). The inverter will not function properly if source logic is selected.•Specifications of synchronous speed operationItemSpecificationsOutput pulse type Pulse width is fixed (10μs)Pulse rate0 to 50kppsPulse transmission delay 1 to 2μs per inverter ** When a pulse transmission delay in a slave is approximately 1 to 2μs and wiring length is long, the delay further increases.♦ Parameters referred to ♦Pr. 291 (pulse train output ) Refer to page 233348