6 Interface Between CNC And PLC
6 - 29
Ex: R235=3 (=11 in binary), Bits 1 and 0 are ON, X and Y-axis are drivable.
R236, For displaying the axis that is on HOME location (machine zero) – For read only
Bit 1 0
Axis on HOME Loc Y X
Ex: R236 = 3 (=11 in binary), Bit 1 & 0 ON, tool on X & Y-axis are on HOME
location.
R237, Displaying the axis of which the HOME operation has been executed
When R237 = 1→Bit 1=0 & Bit 0=1, X-axis HOME operation has been completed.
When R237 = 2→Bit 1=1 & Bit 0=0, Y-axis HOME operation has been completed.
When R237 = 3→Bit 1=1 & Bit 0=1, X and Y-axis HOME operation have been
completed.
Power on default = 0. When Error 01, Error 02, or Error 22 occurs, the value in
R237 will be cleared to 0. Press RESET and execute HOME again. R237 is for
read only.
Ex: R237 = 3 (=11 in binary), Bits 1 and 0 are ON. This indicates that the
HOME operation has been completed in X and Y-axis.
R238, For selecting the axis to be the spindle axis
Default = 0, spindle NOT specified. Only one axis can be selected as spindle at a
time.
R238 = 1, X-axis as spindle.
R238 = 2, Y-axis as spindle.
R241, Keyboard key code as read by the controller
When S017 = 0→1, the controller will read the key code being pressed and store
it in R241. The standard HUST H2N keyboard and the key numbers are shown in
Fig 6-8 below. Refer to C245 and C255 for user redefined keyboard key.
R242, Storing the desired output key code
The definitions of output key code for R242 are in Table 6-5. Refer to C245 and
C255 for user redefined keyboard key.
R250, Input signal type for G31
Use R250 to specify the type of input signal to trigger G31 function as follows.
Once the type of input signal is specified, G31 function will be triggered by the
correct type of signal only. See Operation Manual for G31.
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