Mitsubishi Electric FR-A800, Instruction Manual

Page: 688 / 1042

(A) Application parameters Parameters
5 - 508
●
When the number of encoder pulses is 1024 pulses/r, one revolution (360°) of the encoder is
divided by 4096 pulses so that the degree per pulse can be calculated as 360° / 4096 pulses =
0.0879°/pulse. Refer to the figure below. Stop position (address) is shown within parentheses.
●
When the external stop position command (Pr. 350 = "1") is selected while the FR-A8AX option is
mounted, 16-bit data (binary input) is used to give the stop position.
●
The value set in Pr. 360 "16-bit data selection" should be the divided value minus 1.
I001574E
Fig. 5-244: Encoder addresses
Pr. 360 Setting Description
0 External position command is invalid (speed command or torque command via the FR-A8AX)
1
Position command direct input
The 16-bit digital signal via the FR-A8AX is the direct stop position command.
Example:
When the Pr. 369 "Number of encoder pulses" setting is "1024", the stop position command from "0 to
4095" can be input using FR-A8AX, and the digital signal of "2048 (H800)" is input to stop the motor at a
180° position.
2 to 127
Set the stop position command by dividing up to 128 stop positions.
If the external stop command input is greater than the setting, the stop positions are the same as those
in the maximum external stop command value.
Example:
When the number of stop positions is 90 (divided at intervals of 4°), 90 - 1 = 89. Hence, set "89".
Tab. 5-212: Settings for parameter 360
Example 1: When Pr. 369 = "1024" Example 2: With 8 stop positions Example 3: With 120 stop positions
Pr. 360 = "1"
I002683E
Pr. 360 = "7"
I002684E
Pr. 360 = "119"
I002685E
Origin (0) Origin (0)
CW
Pr. 359 = 0 Pr. 359 = 1
CCW
270
(3072(HC00))
180
(2048(H800))
90
(1024(H400))
Origin (0)
CW
(6)270
(5)225
(1)
45
135
(3)
180
(4)
90
(2)
Origin (0)
CW
(7 or more)
315 °
270
(90)
180
(60)
90
(30)
Origin (0)
CW
At intervals
of 3°