A35228 — TM: Sampling time p4099[3] invalid

A35228 signals that the sampling time set in p4099[3] for the incremental encoder emulation of Terminal Module 41 (TM41) does not correspond to a valid value. Which of the validity rules was violated is stored as an alarm value in r2124. Depending on the drive's configuration, the same condition can also be output as a fault (F) — then with an OFF1 reaction, or in other configurations with no reaction or OFF2 — or as a message without any reaction (N).

• The sampling time set in p4099[3] for the incremental encoder emulation of Terminal Module 41 (TM41) does not correspond to the valid value; which concrete rule is broken is shown by the alarm value in r2124.

1. If necessary, cancel the BICO interconnection via connector input p4420.
2. Check the sampling time in p4099[3] against the validity rules listed with the alarm value below and correct the setting so that it complies with all of them.
3. If necessary, set the BICO interconnection via connector input p4420 again. Note that every time this interconnection is reset, the drive re-checks p4099[3] and outputs the message anew if the value is still invalid.

• The message value is the alarm value from r2124, interpreted as a decimal number:
• 1 — a sampling time p4099[3] less than 125 µs was set.
• 2 — an integer multiple of the DRIVE-CLiQ clock cycle was not entered in p4099[3].
• 3 — in the SINAMICS mode (p4400 = 1), the sampling time in p4099[3] is not an integer multiple of the current controller sampling time (p0115[0]) of the drive object that supplies the position setpoint (CI: p4420) for the incremental encoder simulation; or the encoder interconnected via connector input p4420 (e.g. an SSI encoder) is sampled in a slower clock cycle.

• p4099 — inputs/outputs sampling time: index [3] holds the TM41 incremental encoder emulation sampling time that has to be corrected here.
• r2124 — alarm value: read it as a decimal number to see which of the three validity rules for p4099[3] was violated.
• p4400 — TM41 encoder emulation operating mode: with p4400 = 1 (SINAMICS mode), p4099[3] must also be an integer multiple of p0115[0].
• p0115 — sampling time for supplementary functions: p0115[0] is the current controller sampling time of the drive object supplying the position setpoint, to which p4099[3] must relate as an integer multiple in SINAMICS mode.
• p4420 — CI: TM41 encoder emulation position setpoint: the BICO interconnection via this connector input is canceled and set again so that the drive re-checks p4099[3].

Correct the setting of p4099[3]; the system then automatically performs a warm restart/sub-boot — the message itself requires no acknowledgment.