NPM PPCI7443, Руководство пользователя

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Operation Theorem
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4.2.3 ERC
The ERC signal is an output from PPCI7443. The processing of ERC signal
is a hardware build-in procedure, and it is designed to cooperate with the
deviation counter clear signal of servomotor driver.
The deviation counter clear signal is inserted in the following 4 situations:
᧤
1
᧥
home return is complete;
᧤
2
᧥
the end-limit switch is active;
᧤
3
᧥
an alarm signal stops OUT and DIR signals;
᧤
4
᧥
an emergency stop command is issued by software operator.
Since the servomotor operates with some delay from pulse generated from
the PPCI7443, it keeps moving till the deviation counter of the driver down
to zero even if the PPCI7443 stop outputting pulses because of the
±
EL
signal or the completion of home return. The ERC signal allows you to
immediately stop the servomotor by resetting the deviation counter to zero.
The ERC signal is output as an one-shot signal. The pulse width is a time
length defined by function call
_7443_set_erc(). The ERC signal will
automatically output when
±
EL signals, ALM signal is turned on to
immediately stop the servomotor.
Relative Functions:
_7443_set_erc() : Refer to section 6.12
4.2.4 SVON and RDY
In PPCI7443, every axis is equipped with SVON and RDY, which are
general-purposed output and input channels, respectively. Usually, the
SVON is useful to cooperate with servomotor drivers as Servo ON
command, and RDY to receive the Servo Ready signal from servomotor
drivers. That is the reason why they are named as SVON and RDY. There
is no build-in procedure for SVON and RDY.
The SVON signals are controlled by software function: _7443_Set_Servo().
RDY pins are dedicated for digital input use. The status of this signal can be
monitored by software function _7443_get_io_status().
Relative Functions:
_7443_Set_Servo(): Refer to section 6.12
_7443_get_io_status(): Refer to section 6.13