BY12512d_e.doc / Mai-08
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4.
Ratio Change during Operation
The speed ratio can be changed at any time by changing Factor 1 via serial link. Changing
Factor 1 from 1.0000 to 2.0000 will result in double slave speed. The speed transition can be
sudden or soft. The slave approaches its new speed via an adjustable sin² ramp. See parameter
"Ramp1".
When using operation mode 4, the speed ratio can also be changed via remote push buttons or
PLC signals. In this mode, any activation of the „Index Master“ and „Index Slave" hardware
inputs will cause Factor 1 to continuously increment or decrement. Upon release of the Trim
command, the latest scaling factor will be responsible for the speed ratio.
The speed of incrementing / decrementing can be set by the register "Trim Speed". At any time,
the operative scaling factor can be stored to the EEPROM by hardware signal or software
command. This facility ensures later use of the same speed ratio, also after power down.
To avoid wrong operator settings or exceeding of given limits, Factor 1 range can
be limited by the parameters Factor 1 Minimum and Factor 1 Maximum.
