A35414 — TM: Temperature alarm threshold channel 8 exceeded

A35414 reports that the temperature measured through the temperature sensing of the Terminal Module 150 (TM150) — the value in r4105[8] — has exceeded the alarm threshold stored in p4102[16]. The message concerns channel 8 of the Terminal Module's temperature sensing. As an alarm it only signals the condition; depending on how the drive is configured, the same condition can also be output as a fault (F) or without a reaction (N).

• The temperature (r4105[8]) measured using the temperature sensing of the Terminal Module 150 (TM150) has exceeded the threshold value that initiates this alarm (p4102[16]).
• For sensor type "PTC thermistor" and "Bimetallic NC contact" (p4100[8] = 1, 4), the drive derives the temperature straight from the sensor resistance: if r4101[8] > 1650 ohms it reports r4105[8] = 250 °C, and if r4101[8] ≤ 1650 ohms it reports r4105[8] = -50 °C. With these sensor types the alarm therefore follows from which side of 1650 ohms the measured resistance lies.

1. Read the alarm value r2124 (interpret the number as a decimal): it holds the temperature actual value at the moment the alarm was initiated.
2. If p4100[8] = 1 or 4 (sensor type "PTC thermistor" or "Bimetallic NC contact"), read the sensor resistance r4101[8]: above 1650 ohms the drive reports 250 °C, at 1650 ohms or below it reports -50 °C.
3. Let the sensor cool until the measured temperature is below the alarm threshold minus the hysteresis; the drive then withdraws the message by itself.

• The alarm value r2124 holds the temperature actual value at the time the alarm was initiated; interpret the value as a decimal number in units of 0.1 °C.

• r4105 (CO: Spindle supplementary temperature actual value) — the temperature actual value of the TM150 channel; r4105[8] is the value that exceeded the threshold and raised this alarm.
• p4102 (Spindle supplementary temperature fault threshold/alarm threshold) — the alarm threshold for this message; it initiates when r4105[8] exceeds p4102[16] and clears below p4102[16] - p4118[8].
• p4100 (Spindle supplementary temperature sensor type) — the sensor type of the channel; "PTC thermistor" and "Bimetallic NC contact" correspond to p4100[8] = 1, 4.
• r4101 (TM120 sensor resistance) — the measured sensor resistance; for PTC and bimetallic NC sensor types it decides between 250 °C and -50 °C at the 1650 ohms limit.
• r2124 (Alarm value) — stores the temperature actual value at the time of initiation of this alarm; interpret the number as a decimal.
• p4118 (TM150 fault threshold/alarm threshold hysteresis) — the hysteresis subtracted from the threshold; the sensor must cool below p4102[16] - p4118[8] before the alarm withdraws.

The manual's remedy is: Allow the temperature sensor to cool down to below p4102[16] - hysteresis (p4118[8]). Once the measured temperature is below this value, the alarm clears by itself and no acknowledgement is needed. If the drive is configured to output the same condition as a fault instead, the acknowledgement is IMMEDIATELY (POWER ON), i.e. the drive must be powered up again before it can be restarted.