n = The axis designator (XYZW or ABCDEFGH) Each axis must be set individually
si0 = 0 is for NO SSI
1 is for SSI to replace MAIN encoder data
2 is for SSI to replace AUX encoder data
si1 = Total # of Bits of SSI. A positive number designates No Rollover. A negative
number will cause the controller to act as an incremental encoder, allowing the
encoder to count past the max value of the encoder. (Note: when the controller is
powered down, the rollover values are lost)
si2 = # of Single Turn Bits
si3 = # of Status Bits (ie: Error Bits)
Positive # designates status bits as trailing the SSI data
Negative # designates status bits as leading the SSI data
The number of Multi-turn bits of the encoder is internally calculated by the following
equation: Multi-turn Bits = (Total Bits) - (Single-Turn) - (Status Bits)
p designator for post March 2006 DB-28040 firmware
SSI Freq =
)
1
(
2
25
+
p
MHz
for Optima/Econo
SSI Freq=
)
1
(
2
27
+
p
MHz
for Accelera
Common p values are shown below (p is an integer with a range of 4-26)
p Optima/Econo Accelera
p=13 is recommended (~1Mhz clock frequency)
4 2500
kHz
2700 kHz
for standard SSI applications
8 1389
kHz
1500 kHz
12 962
kHz
1038 kHz
Note: A positive value for p reads data on the rising
13 892
kHz
964 kHz
clock edge, a negative value reads data on the
24 500
kHz
540 kHz
falling clock edge.
26 463
kHz
500 kHz
p designator for DB-14064 and pre-March 2006 DB-28040 firmware
p =
1, 2, -1 or -2 based on type of clock interface as shown below*:
Fast Clock (1.25MHz)
Slow Clock (1.0 MHz)
Rising
Edge
1 -1
Falling
Edge
2 -2
q =
1 for Binary Code
2 for Gray Code
SIn=? Returns the configuration parameters (where n is the axis)
- 2 -
Galil Motion Control, Inc.
· 3750 Atherton Road · Rocklin, CA 95765 USA · 800-377-6329 · Ph: 916-626-0101 · Fax: 916-626-0102 · www.galilmc.com
