JVL MAC050 User Manual page 57

2.9 Using external SSI encoder
2.9.5 Setup SSI using MacTalk
To setup the MAC-motor for reading the SSI encoder value at startup, first set the I/O
setup for using SSI input. This means that the A and B input -channels are setup for input
on both. Because the plugs doesn't support any 24V supply output for supplying the en-
coder, both IO1 and IO2 can be used for this purpose.
SSI setup on the advanced tab.
This section gains access to the registers 178, for setting up the SSI functionality previ-
ously described.
The SSI position is stored in register P8, which is displayed under this section too. The
value is also accessible from the register-tab.
Reset position procedure
To reset the motor to a specific position, first read the SSI encoder value by setting reg-
ister 211 = 1
This will reset the motor and read the SSI value. Next set the Reset-bit in the SSI_SETUP
register (register 178 bit 3). Now the encoder value has been transferred to P6 and
needs to saved in flash. The Flash saving procedure is done by writing 211 = 2.
This will also reset the motor and calculate the new position based on the saved value.
If a preset value is to be used instead of 0, this value is entered in P4 and will automatically
be used when the motor starts up (previously explained).
If this preset value is to be used, simply write the position to position register P4 (register
55) and save the value to flash memory by writing 211 = 2.
Read SSI procedure.
Every time the motor is power cycled or a software is commanded the SSI encoder is
read at startup.
To do a software reset simply write register 211 = 1 and let the motor startup. The
reading and the startup will take approximately 1-2 seconds.
JVL Industri Elektronik A/S - User Manual - Integrated Servo Motors MAC050 - 800
TT1159GB
Output 2 is selected for driving
the power supply to the encoder.
Only MAC050 to 141
This will setup the Multiturn I/O for using
both A and B channel in communicating
with the encoder using SSI
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