·162·
Installation manual
CNC 8060
CNC 8065
2.
MACHINE PARAMETERS.
(REF: 1402)
Machine parameters for the axes. Work sets.
SSICLKFREQ
SSI communication frequency.
Possible values: From 59 to 7500 kHz.
Default value: 150 kHz.
Associated variable: (V.)[ch].MPA.SSICLKFREQ[set].xn
Frequency of the clock for SSI communication.
SSIDATAFORMAT
Parameters to set the format of the SSI transmission reading
data.
The position read via SSI transmission may be received in different formats.
• The following parameters set the amount of SSI data that will be read.
• The following parameters set the order and format used for the system to send the data.
• The following parameters set how to interpret the bits that determine that the SSI
transmission has been successful.
SSIDATALENGTH
Number of bits of the SSI transmission that make up the position
value (coordinate).
Possible values: From 0 to 255.
Default value: 0.
Associated variable: (V.)[ch].MPA.SSIDATALENGTH[set].xn
Number of bits of the SSI transmission that make up the position value (coordinate). For
example, 32 for Fagor absolute linear encoders with the default parameters.
SSIPACKFORMAT
SSI package format.
Possible values: Data / Data-CRC / CRC-Data / Data-Alarm / Alarm-Data / Data-CRC-Alarm /
Alarm-Data-CRC / Data-Alarm-CRC / Alarm-CRC-Data / CRC-Data-Alarm / CRC-Alarm-Data.
Default value: Data.
Associated variable: (V.)[ch].MPA.SSIPACKFORMAT[set].xn
This parameter indicates the order in which the different data types of the SSI transmission
will be received. Depending on parameters SSICRCBITS and SSIALARMBITS, only the
possible options will be displayed. The order indicated by the parameter is the one that
Parameter. Meaning.
SSIDATALENGTH Number of bits of the SSI transmission that make up the position value
(coordinate).
SSICRCBITS Number of bits, if any, for some kind of transmission validity check (CRC,
checksum, parity).
SSIALARMBITS Number of bits, if any, for transmission OK check.
The feedback device can send one or more bits indicating an alarm
condition if something goes wrong or one or more acknowledgment bits
if the transmission is successful.
SSISTARTBITS Number of bits, if any, to wait for before receiving position data.
Parameter. Meaning.
SSIPACKFORMAT Order in which the encoder sends the data. Whether the position data,
the CRC or the alarm is received first and in which order. If start bits have
been programmed, it is assumed that they will be received first.
SSIDATAMODE Order in which the most significant bit is transmitted
• SSIDATAMODE = 0; the LSB (Least Significant Bit) is the first one.
• SSIDATAMODE = 1; the MSB (Most Significant Bit) is the first one.
Parameter. Meaning.
SSIALARMLEVEL Values that may make the encoder transmit one or more bits indicating
some kind of error.
SSICRCTYPE Type of calculation to do when the encoder transmits extra data besides
the position value in order to run a data coherence check.
To Next Page
Loading...
