Can introduce type absolute encoder serial and parallel output of the detail information, Parallel output:

Absolute encoder output is more than a digital (gray code or pure binary code), parallel output is more high and low level of output at the interface, to represent digital 1 or 0, for absolute encoder digits is not high, generally to directly form the output digital, can be directly into the PLC or PC's I/O interface, instant output, simple connection. But parallel output has the following problems:

1. Must be gray code, because so pure binary code, there may be a number of changes in data refresh, reading can cause wrong words.if in a short time.

2. All interfaces must ensure that the connection is good, because if there are individual connection bad point, that point potential is always 0, cause wrong words.if without judgment.

3. Transmission distance not far, in one or two meters, for complex environment, it is better for isolation.

4. For more digits to many core cable, and to ensure the connection is good, the resulting engineering difficulty, also, for the encoder, at the same time there are many nodes output, increase the rate of encoder failure damage.

Parallel: on time, data issued at the same time; Space, each digit data takes up a cable.

Incremental encoder output is usually a parallel output.

Serial output:

Serial output is by convention, have successively data output on time, this convention called communication agreement, the physical form of connection with RS232 and RS422 (TTL), RS485, etc.

Serial output cables, transmission distance, for the protection of the encoder and the reliability is greatly improved, high absolute encoder are commonly use serial output.

As part of the absolute encoder well-known manufacturers in Germany, so most of the serial output is matched with Germany's Siemens, such as SSI synchronous serial output, main line is the output of profibus-dp, etc.

Serial output encoder connection of Germany's Siemens equipment is relatively easy, but the connection is not in the department of German equipment, the interface is the problem, my company offers all kinds of output interface instrument, can solve this problem.

Serial: on time, the data in accordance with the contract, have successively; On the space, all digits of data on a set of cable (has).