IAI America SCON-C - Manual (Page 219)

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Appendix
3.2.6 Others
 Timer period for emergency-stop relay fusing monitor
The controller has a built-in emergency stop relay for cutting off the motor drive power, so fusing of this relay is
detected.
If the motor AC power is not cut off after elapse of the timer period set by this parameter following the cutoff of
the driver power, the controller will recognize that the relay has been fused and generate an alarm.
Normally this parameter need not be changed. If you have installed an additional drive-power cutoff relay, etc.,
with a timer and are using the relay with a timer period longer than the factory setting, however, the value of
parameter No. 72 should be changed accordingly.
The factory setting is “3,000” [msec]. If a value between 0 and 9 is set, fusing of the relay will not be detected.
 Encoder voltage level
To stabilize encoder detection signals, this parameter sets the voltage supplied to the encoder circuit to one of
four levels in accordance with the encoder type and the length of the encoder relay cable.
Normally this parameter need not be changed. If you have changed the length of the encoder relay cable
supplied with the controller, however, the value of parameter No. 73 must be changed accordingly.
If you wish to change this parameter, always consult IAI in advance. (If set inappropriately, this parameter may
cause problems such as an encoder failure.)
 PIO power monitor [0: Enable /1: Disable]
A power monitor function is provided to prevent burning of the I/O board or breakdown of parts caused by an
abnormal voltage of the 24-V PIO power supply.
Although it is recommended to enable this function, it can be disabled in certain situations such as when making
adjustments during trial operation.
To disable the function, set parameter No. 74 to “1 [Disable].”
The factory setting is “0 [Enable].”
* If a fieldbus module (such as a CC-Link or DeviceNet module) is installed, the controller will not perform PIO
power monitor regardless of the setting of this parameter.
 Electromagnetic-brake power monitor [0: Disable /1: Enable]
A power monitor function is provided to prevent actuator malfunction or breakdown of parts caused by an
abnormal voltage of the 24-V brake power supply when an actuator with brake is used.
Normally this parameter need not be changed because it has been set properly prior to the shipment in
accordance with the actuator, i.e., whether or not the actuator is equipped with a brake. If you have changed the
original actuator specification, however, change the value of parameter No. 75 accordingly.
The factory setting is “0 [Disable]” if the actuator has no brake, and “1 [Enable]” if the actuator is equipped with a
brake.
 Belt-breaking sensor input characteristics
This parameter sets the input characteristics of the belt-breaking sensor on the ultra-high thrust RCS2-RA13R.
The factory setting is “Contact B.”
Parameter No. Setting
Not used 0
Contact A 1 76
Contact B 2