ABB标准I/O板都是挂在DeviceNet现场总线下的设备,通过哪个端口与DeviceNet现场总线进行通信。( )
A: X1
B: X4
C: X5
D: X6
A: X1
B: X4
C: X5
D: X6
举一反三
- ABB标准I/O板DSQC651都是下挂在DeviceNet现场总线下的设备,通过()端口与DeviceNet现场总线进行通信
- ABB标准I/O板都是下挂在DeviceNet现场总线下的设备,通过 与DeviceNet现场总线进行通讯的。
- 如果进行ABB标准I/O板通讯,就必须有DeviceNet的总线。
- 继续上题,为了程序编写简洁,要给数据框x中的6列重新命名为x1,x2,x3,x4,x5,x6,应该使用的命令是() A: ColNames(x) <- c("x1","x2","x3","x4","x5","x6") B: Names(x) <- c("x1","x2","x3","x4","x5","x6") C: colnames(x) <- c("x1","x2","x3","x4","x5","x6") D: colname(x) <- c("x1","x2","x3","x4","x5","x6")
- ABB 标准 I/O 板是挂在 DeviceNet 网络上的