STP-iX455/iXL455 Series Instruction Manual
9-5
Operation
9.2.5 Serial Communication Timeout Setting
If the signal to the input operation port of the STP pump is interrupted for a certain
period during acceleration or normal operation, the STP pump detects a failure and
stops.
The time setting of the failure detection is user definable. When setting the value to 0,
the function is disabled. This value will be common to all serial ports, and the factory
setting is 1 min.
The setting value can be changed via serial communication (see Section 9.4.15), the
STP-Link (optional accessory), or the display unit iDT-001 (optional accessory).
Design the user application so that the PC can communicate with the STP pump at
fixed regular intervals within the setting time, except when the function is disabled (the
value is 0).
Table 9.4 Serial Communication Time Out Setting
Default Setting Range Remark
Serial communication
time out setting
1 min.
0 to 500 min.
(1 min. step)
The function is disabled
when the value is set to 0.
◇ When the communication time out is disabled, the STP pump may not stop when
the serial communication does not function normally due to a breakage of the
communication cable. In this case, interrupt the power supply for 2 seconds or
more to stop the STP pump by power failure detection. Supply the power to the
STP pump immediately after power failure detection.
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