发布时间 : 星期六 文章西门子840D调试知识更新完毕开始阅读b71df58ace2f0066f5332277
in the appropriate parameters or tables.
References: /FB/, K3 “Compensations” Special cases
If individual axes have to be activated, the gantry groups must be temporarily canceled. As the second axis no longer travels in synchronism with the first axis, the activated axis must not be allowed to traverse beyond the positional tolerance.If the gantry grouping is canceled, the following points must be noted:
_ Always activate the traversing range limits and set them to the lowest possible values (position tolerance) _ Synchronize the gantry grouping first if possible and then execute a POWER-ON-RESET without referencing the axes again. This ensures that the traversing range limits always refer to the same position (i.e. that which was valid on power ON).
_ Avoid using the step-change function. Position step changes are only permissible if they stay within the permitted tolerance.
_ Always use an offset of 0 for the function generator and measuring function in contrast to the recommendations f
or normal axes.
_ Set the amplitudes for function generator and measuring function to such low values that the activated axis traverses a shorter distance than the position tolerance allows. Always activate the traversing range limits as a check (see above).
References: /FBA/, DD2 “Speed control loop” Start-up support for gantry groupings SW 5.1 and higher
The start-up functions “Function generator” and “Measurement” are
parameterized via PI services, as in earlier SW. All parameterized axes
commence traversing when the NC Start key on the MCP panel is pressed in JOG mode.
A window is displayed in the “Measuring function and function generator in
gantry grouping” operator interface. Two amplitude values, each with an offset
and bandwidth, must be entered in this window. The first amplitude value
applies to the measuring axis and the second to the other coupled axes. PLC接口信号
可以通过主/从动轴的PLC接口获得耦合轴的特定的接口信号。下表显示了带有编码的所有龙门的PLC的接口信号，并表明了是主动轴还是从动轴。
点击此处查看附件
a) PLC –> NCK
PLC到轴的接口信号可以应用与龙门组所有的轴，因此龙门组所有的轴具有相同的优先权。例如：如果主动轴的“Servo enable” (DB31, ... ; DBX2.1) =“0” 则龙门组其他所有的轴同时关闭。
点击此处查看附件
点击此处查看附件
无论是在“跟随模式”状态(IS of one gantry axis = 1)还是
在“停止”状态(IS of allgantry axes = 0)，“跟随模式”的功能都可以为所有龙门轴激活。 b) NCK –> PLC
主动轴和从动轴到PLC的接口信号是基于特定轴的基础上进行设
置
的
并
输
出
到
PLC
，
例
如
“Referenced/Synchronized 1/2” (DB31, ... ; DBX60.4/60.5)。
在JOG方式下，不可能直接移动从动轴。移动键命令在控制系统内部给忽略了。手轮也是如此。
手轮的附加运动只能应用于耦合模式的主动轴。从动轴跟随主动轴移动。
DRF偏移只能应用于耦合模式的主动轴。从动轴跟随主动轴移动。
只能对主动轴编程，对从动轴的编程将有报警输出。 使用FC18的PLC只能移动主动轴，或者从动轴作为一个命令轴。
预置功能（ PRESET function）只能应用于主动轴。当预置功能激活时，在控制器内部，龙门组的所有轴重新评估 。此时，龙
门
组
失
去
参
考
点
和
同
步
(IS“Gantry grouping synchronized” = “0”). RELEASE 命令将自动释放龙门组中所有的轴。
实际位置值显示区域将显示主动轴和从动轴的实际值，这同样