Functions - Mitsubishi Electric NZ2FTGN User Manual

Functions

This section describes the functions of the NZ2FTS-D66D1.
Function list
Item
SSI monoflop time setting function
SSI transmission speed setting
function
SSI trailing bit setting function
SSI code length setting function
SSI mode setting function
Clock signal bit order setting function
Clock signal edge setting function
SSI code setting function
Encoder input enable/disable setting
function
SSI monoflop time setting function
SSI monoflop time (Tp) refers to the period of time required for synchronization with the data refreshing cycle of an SSI
absolute encoder.
To establish communications with an SSI absolute encoder, ensure the time period until the data transmission of the SSI
absolute encoder is reset (Tm) and set the parameter "Delay time" so that Tp is longer than Tm. ( Page 555 Parameter
settings)
1
NZ2FTS-D66D1
SSI
absolute
encoder
The SSI monoflop time setting ("Delay time") is restricted according to the setting of the parameter "SSI transfer rate".
SSI transfer rate Delay time
1s
125kHz Not settable
250kHz Not settable
500kHz Not settable
1MHz Settable
1.5MHz Settable
2MHz Settable
*1 The SSI monoflop time (Tp) to be actually enabled is 666ns.
Description
Sets the period of time required for synchronization with the data refreshing cycle of the
SSI absolute encoder to be connected (SSI monoflop time).
Sets the speed of the SSI transmission with the SSI absolute encoder.
The SSI transmission speed is set with the parameter "SSI transfer rate".
Sets the number of trailing bits when the SSI absolute encoder to be connected has
trailing bits.
The number of trailing bits is set with the parameter "Number of indicator bits".
Sets the SSI code length to the number of bits that is the sum of the resolution of the
connected SSI absolute encoder and the trailing bits.
The SSI code length is set with the parameter "Number of frame data bits".
Sets the start mode (Listening/Master).
The SSI mode is set with the parameter "SSI mode".
Sets the bit order of the clock signal (MSB/LSB).
Sets the edge of the clock signal (rising or falling).
Sets the SSI code to "Gray code" or "Binary code" according to the SSI absolute encoder
to be connected.
The SSI code is set with the parameter "Data format".
Sets whether to enable or disable the encoder input.
Whether to enable or disable the encoder input is set with the parameter "SSI interface".
3 4 5
2
Dn-2
Dn Dn-1 Dn-3
2s 4s
Settable
Settable
*1
Settable
6 7 8 9
Tm
D1
D3 D2 D0
8s 16s
Settable
20 ABSOLUTE ENCODER MODULE
Reference
Page 553 SSI monoflop
time setting function
Page 555 Parameter
settings
Page 555 Parameter
settings
Page 555 Parameter
settings
Page 555 Parameter
settings
Page 554 Clock signal
bit order setting function
Page 554 Clock signal
edge setting function
Page 555 Parameter
settings
Page 555 Parameter
settings
Tp
32s 48s 64s
20.1 NZ2FTS-D66D1
20
553