RMC100 and RMCWin User Manual
A-12
These links types already define both true and false actions, and therefore should not be used
with the Poll command.
• Math Compares/Errors link types
These links types already define both true and false actions, and therefore should not be used
with the Poll command.
• Jump (J) link type
This link type will already take a link immediately in all cases and therefore should not be used
with the Poll command.
Example 1:
The user wants to make a move to position 4000, and wants to know when either the axis is in
position or an overdrive error occurs. The following Event Step sequence accomplishes this using
the Poll (?) command:
11
12
Value
Axes
Step 10 starts the move to 4000, and links immediately using the DelayMS (D) link type to step
11.
Step 11 checks for an overdrive error. It does this by doing a polled BitsON (B) link type for the
Overdrive Error bit (0x1000) of the Status word on the current axis. If this error bit is set, then
control goes to the step indicated by the Link Next: step 15. Otherwise, control proceeds to the
next step: step 12. Notice that without the Poll (?) command, this link type would wait indefinitely
until an overdrive error occurs and would otherwise never proceed to step 12.
Step 12 checks the In Position bit (0x0001) of the Status word, also using the BitsON (B) link
type. So, if the axis is in position, control passes to step 14, otherwise control passes to the next
step: step 13.
Step 13 links immediately back to step 11 to repeat the polling loop. Notice that this extra step
does take one control loop to process and therefore increases the time taken to process the
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