
B–63833EN–1/02
2. PREPARATIONS FOR OPERATION
155
[Classification] Input signal
[Function] Enables the motor speed detection function.
[Operation]
When this signal is 1, the motor speed detection function is enabled.
The servo/spindle motor speed detection function allows the CNC to
output a detected result to the Y addresses directly. Normally, only the
PMC can write to the Y addresses. When this function is used, however,
the CNC can also write to the Y addresses. Therefore, care must be taken
not to write to the Y addresses from both the CNC and PMC.
When this signal is 1, the CNC enables this function, assuming that the
PMC ladder does not use the address set in parameter No. 1891 and the
next address (the setting + 1).
When the signal is 0, the CNC disables this function, assuming that the
PMC ladder is using these Y addresses.
When using the servo/spindle motor speed detection function, remember
to add the processing for setting the motor speed detection function enable
signal to 1 to the PMC ladder. When doing so, care must be taken to
ensure that the PMC ladder does not use the address set in parameter No.
1891 and address (the setting + 1), as the Y address.
CAUTION
1 Immediately after the PMC ladder starts operating, set the
signal to 1.
2 When this signal is set to 0 after the CNC starts, the
servo/spindle motor speed detection function is not
disabled.
(n is the value set in parameter No. 1891.)
[Classification] Output signal
[Function] Report the motor speed status of each of the axes controlled by servo
motors.
[Operation] Each signal is set to 1 when:
· The servo motor speed exceeds the maximum speed set in parameter
No. 1890.
Each signal is set to 0 when:
· The servo motor speed does not exceed the maximum speed set in
parameter No. 1890.
Signal
Motor speed detection
function enable signal
MSDFON <G016#0>
Servo motor speed
detection signals DSV1
to DSV4 <Y(n + 0)>