1.6.1 Message suppression at startup Procedure In order to reduce load on the AS during startup as a result of simultaneous generation of several messages at different blocks you should define an input parameter RUNUPCYC of the data type INT. At this parameter you can declare the number of startup cycles during which messages should be suppressed. In the block algorithm, you then count the number of calls and only enable the generation of messages if the programmed number of cycles has been completed. The extract from the block template below shows this procedure. 

PCS7的编程手册里初始化就2件事。

1。初始化参数

   电机操作化一般就是复位输出，复位电机的状态，复位到手动模式，复位错误消息，处理脉冲启停，将电机处于中性位置。对电机来说，电机的中性位置就是停止。

2。在CPU的启动前几个周期抑制报警消息。

抑制消息就是为了减小CPU在启动时的负荷。

SFC6读OB启动信息。