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94
Axis Parameter Area
Section 4-4
Bit Configuration
The bit configuration for the word addresses in the above table is shown
below.
Settings
The initial pulse designation can be set to either of the following:
0000:
250 pps
0001:
Maximum speed specified with axis parameters
The default setting is 0000.
Explanation
This setting specifies the speed of the first pulse when operation starts. When
axis operation starts, the speed of the first pulse based on the acceleration
curve is calculated. If this speed is less than the speed specified with this
parameter, the first pulse is automatically output with the speed specified
here. This means that the time required until pulse output starts is reduced.
Note
If the initial pulse speed is set to the maximum speed specified with axis
parameters, set this maximum speed to a value less than the maximum input
response frequency of the driver that runs the servomotor or the stepping
motor. If it is set to a value greater than the maximum input response fre-
quency, then this will cause position errors (due to the driver miscounting
pulses).
Example
The pulse output when performing jog operation with a parameter setting for
maximum speed of 500 kpps (default setting), acceleration time set to 0 s,
deceleration time set to 0 s, and speed set to 10 pps. The pulse-output wave-
forms are given for two cases: Case 1 is for when the initial pulse designation
is set to 0 and case 2 is for when it is set to 1. Although, the time from the
PCU receiving the startup instruction for jog operation from the CPU Unit until
internal processing is performed will be the same for the two cases, the time
for the first pulse will be reduced from 4 ms (250 pps) to 0.002 ms (500 kpps),
in other words the time required will be reduced by just under 4 ms.
15
00
0
0
0
X (= 0 or 1)
PCU's internal processing
Command to start JOG operation
(CPU Unit
→
PCU)
Case 1: Pulse output at 250 pps
Case 2: Pulse output at 500 kpps
Summary of Contents for CJ1W-C113 - REV 02-2008
Page 2: ...CJ1W NC113 213 413 133 233 433 Position Control Units Operation Manual Revised February 2008 ...
Page 3: ...iv ...
Page 13: ...xiv ...
Page 15: ...xvi ...
Page 19: ...xx ...
Page 27: ...xxviii Conformance to EC Directives 6 ...
Page 43: ...16 Control System Principles Section 1 7 ...
Page 47: ...20 Basic Procedures Section 2 ...
Page 139: ...112 Examples of Parameter Settings Section 4 9 ...
Page 173: ...146 Transferring Data with CX Position Section 5 7 ...
Page 223: ...196 Sample Program Section 7 7 ...
Page 259: ...232 Sample Program Section 8 10 ...
Page 293: ...266 Easy Backup Function Ver 2 0 or later Section 9 11 ...
Page 369: ...342 Reading Error Information with CX Position Section 11 8 ...
Page 385: ...358 Common Parameter Area Appendix C ...