Is it Necessary to Transmit the Correct Number of Clock Pulses to the Encoder?
Yes! • Before the first position-value request, word 13 of the EnDat 2.1 parameters must be read out, so that the subsequent electronics can correctly determine the number of clock pulses to be sent. EnDat 2.1 commands must be used to read out the information. • If not enough clock pulses are transmitted, then some information will not be available to the user, and the encoder hangs in the middle of the communication cycle. So under certain circumstances, the next communication will fail. • If too many clock pulses are transmitted, then the encoder interprets this as a continuous clock. The encoder is then within a communication cycle again, and under circumstances the next communication will fail. • The communication with the encoder may seem to be functioning, but if the timing changes slightly, for example, it will fail suddenly. Sporadic communication errors can also occur.
