我有7个子站上有FM350-2模块.有时出现某些子站读数IMPOSS=TRUE的情况,请问什么情况下会出现这种现象?我该怎么处理?
手册上的说明是:.IMPOSS, 2 = 1: Read job cannot be processed (the FM 350-2 is not assigned parameters, startup or PG operation are active). You can leave the read job JOB_RD) or delete it. The function CNT2_RD clears the bit when the above conditions are fulfilled.
是指350-2未分配参数、CPU启动（？）或PG站激活（下载硬件参数时？）这些情况吗？是否有其他情况引起？（如网络速度、通讯繁忙、子站断电等）。当出现IMPOSS时，leave the read job JOB_RD) or delete it.怎么理解？
这问题困扰我快一个月了。请各位帮忙了。谢谢。