STP-iS2207 Series Turbomolecular Pump
MT-89E-001-C
Page 73
5
SERIAL COMMUNICATION PROTOCOL
5.2.5 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 minute.
The setting value can be changed via serial communication (see 5.4.17), 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).
Default Setting Range Remark
Serial
communication
time out setting
1 minute 0 to 500 minutes
(1 minute step)
The function is disabled when the
value is set to 0.
Table 19 - Serial communication time out setting
Note: 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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