A07565 — Drive: Encoder error in PROFIdrive encoder interface 1

A07565 reports that encoder 1 has signaled an error across the PROFIdrive encoder interface: the error flag in the encoder status word is set at G1_ZSW.15. The error code that arrived with it in G1_XIST2 says which encoder error it is — the drive stores it as the alarm value in r2124, to be read decimal, and explains the possible codes with r0483, the encoder actual position value Gn_XIST2.

The drive only outputs this alarm when a signal source is interconnected for the encoder control word, i.e. when p0480[0] is not equal to zero. Depending on the drive configuration, the same condition can also be issued as a fault (F) or as a message without a reaction (N) instead of this alarm.

• An encoder error was signaled for encoder 1 via the PROFIdrive encoder interface — the drive received the error flag at G1_ZSW.15.
• The error code delivered in G1_XIST2 identifies the concrete encoder error; the drive stores it as the alarm value in r2124 (interpret decimal).

1. Read the alarm value in r2124 and interpret it decimal: it contains the error code that encoder 1 delivered via G1_XIST2. Which error the code stands for is described with r0483.
2. Check the encoder status word Gn_ZSW, readable in r0481[0...2] for encoders 1, 2 and 3; for encoder 1 the error flag sits at G1_ZSW.15.
3. Acknowledge the encoder error using the encoder control word — set G1_STW.15 = 1. The control word for encoder 1 reaches the interface from the signal source interconnected at p0480[0]; the signal sources for the encoder control words Gn_STW of encoders 1, 2 and 3 are set at p0480[0...2].

• The drive writes the alarm value of this message to r2124; interpret the value decimal.
• The value is the error code from G1_XIST2. Its decoding is not printed with the message itself — the manual refers to the description of r0483 (encoder actual position value Gn_XIST2) for what each code means.

• r2124 — alarm value: holds the value belonging to this message; read it decimal to obtain the error code from G1_XIST2.
• r0483 — CO: encoder actual position value Gn_XIST2: the description of this parameter explains the error codes reported here, so it is the reference for decoding r2124.
• p0480 — CI: encoder control word Gn_STW signal source: interconnects the encoder control word (p0480[0] for encoder 1); the alarm is only output when p0480[0] is not 0, and the acknowledgment G1_STW.15 = 1 is given through this signal source.
• r0481 — CO: encoder status word Gn_ZSW: shows the status words of encoders 1, 2 and 3 (r0481[0...2]); G1_ZSW.15 is the error flag behind this alarm.

Nothing is reset through a parameter; the action the manual gives is: Acknowledge the encoder error using the encoder control word (G1_STW.15 = 1). The signal source for that control word is interconnected at p0480[0]. As an alarm, the message itself does not require an acknowledgment on the drive; if the drive is configured to raise the same condition as a fault instead, it must be acknowledged immediately once the encoder error has been cleared.