GE DS200TCPSG1APE Channel relay module

If the direction sense of an encoder with a properly working servo is changed without also changing the direction sense of the output, destabilizing positive feedback to the servo and a dangerous runaway condition will result. In the pulse-and-direction decode modes, PMAC is expecting the pulse train on CHAn and the direction (sign) signal on CHBn. If the signal is unidirectional, the CHBn line can be allowed to pull up to a high state, or it can be hardwired to a high or low state.

If MI910 is set to 8, the decoder inputs 

the pulse and direction signal generated by Channel n's pulse frequency modulator (PFM) output circuitry. This permits the Compact MACRO Station to create a phantom closed loop when driving an open-loop stepper system. No jumpers or cables are needed to do this; the connection is entirely within the ASIC. The counter polarity matches the PFM output polarity automatically. If MI910 is set to 12, the timer circuitry is set up to read magnetostrictive linear displacement transducers (MLDTs) such as TemposonicsTM. In this mode, the timer is cleared when the PFM circuitry sends out the excitation pulse to the sensor on PULSEn, and it is latched into the memory-mapped register when the excitation pulse is received on CHAn.

Brand display

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