3-4．In-circuit emulation
First install the BD board in PLC COM4, then set ON SM2018+20*N (N is axis no.). Now the
PLC is in in-circuit emulation mode. It can simulate the PLC running without connecting the
servo system. The parameters and state feedback will be calculated inside the PLC and be
consistent to the state of connecting the servo system.
3-5．Protection
PLC will enter online download mode when communication is error or servo enable is off, the
servo system will urgent stop. If the PLC stop, the servo will urgent stop.
Note:
1. The power of servo system must cut off after the PLC power cut off, otherwise the servo
will revolve rapidly when the PLC startup.
2. The power on order: the servo and PLC must power on at the same time, or the servo
power on first.
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General