7 SSI Input Units
7 - 34
NX-series Position Interface Units User’s Manual (W524)
The bit configuration of the Status Data parameter is given in the following table.
n: Channel number
The bit configuration of the Encoder Present Position Refresh Count parameter is given in the following
table.
n: Channel number
The bit configuration of the Time Stamp parameter is given in the following table.
Refer to 7-9-9 Time Stamping on page 7-56 for details on time stamps.
Note An EtherCAT Coupler Unit with unit version 1.1 or later is required.
n: Channel number
Status Data
Byte Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0
0 STDn (Chn Status Data LL)
+1 STDn (Chn Status Data LH)
+2 STDn (Chn Status Data HL)
+3 STDn (Chn Status Data HH)
Abbr. Data Description
STDn Chn Status Data This contains the status data obtained from the encoder for channel n.
Encoder Present Position Refresh Count
Byte Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0
0 CVRn (Chn Encoder Present Position Refresh Count L)
+1 CVRn (Chn Encoder Present Position Refresh Count H)
Abbr. Data Description
CVRn Chn Encoder Present Position
Refresh Count
This bit is incremented by 1 every time the present value of chan-
nel n is refreshed.
The value returns to 0 after it exceeds 65,535.
Time Stamp
Byte Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0
0 TMSn (Chn Time Stamp, 1st byte)
+1 TMSn (Chn Time Stamp, 2nd byte)
+2 TMSn (Chn Time Stamp, 3rd byte)
+3 TMSn (Chn Time Stamp, 4th byte)
+4 TMSn (Chn Time Stamp, 5th byte)
+5 TMSn (Chn Time Stamp, 6th byte)
+6 TMSn (Chn Time Stamp, 7th byte)
+7 TMSn (Chn Time Stamp, 8th byte)
Abbr. Data Description
TMSn Chn Time Stamp Contains the time stamp for when Chn changed.
It stores the DC time. (Unit: ns)
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