Eaton ELC-PB, Programming Manual

Page: 316 / 728

3 . I n s t r u c t i o n S e t
M N050 03003E F or mo re infor ma tio n vi sit:
w w w. e a t o n . c o m
3-147
N
: Rotation speed
n
: The number of pulses per rotation of the motor N=
( )
( )
rpm
nt
D
3
10
0 60
×
t
: Detection time specified by
S
2
(ms)
10. When M1036 in the ELC-PH series (V1.4 and above) is enabled, the SPD instruction can
detect the speeds at X0 ~ X5 at the same time with a total bandwidth of 40KHz.
11. ELC-PV models: When the SPD instruction is enabled and M1100 = On, the SPD instruction
will perform a sampling at the moment when M1100 goes from Off to On, then stop the
sampling. If you wish to resume the sampling, you must turn Off M1100 and re-enable the SPD
instruction.
Description: (ELCM-PH/PA)
1. External pulse input terminals designated in
S
1
for ES2 series ELC controllers:
Available input points X0, X2
X1(X0/X1), X3(X2/X3),
X5(X4/X5), X7(X6/X7)
X6, X7
Input mode
1-phase input
(Supports single
frequency )
AB-phase input
(Supports 4 tmes
frequency)
1-phase input
(Supports single
frequency)
Maximum frequency
100KHz 5KHz 10KHz
2.
D
occupies 5 consecutive registers,
D
+ 1 and
D
store the results of previous pulse detection;
D
+3 and
D
+ 2 store the current accumulated number of pulses;
D
+ 4 stores the current time
remaining (max. 32,767ms).
3. If X0 ~ X7 are used in a SPD instruction, their associated high-speed counters and external
interrupts I000/I001, I100/I101, I200/I201, I300/I301, I400/I401, I500/I501, I600/I601 or
I700/I701 cannot be used.
4. When X0, X2, X6 and X7 are used, they will be detected as 1-phase inputs. When X1, X3, X5,
X7, is used, X0, X2, X4, X6 (A) and X1, X3, X5, X7 (B) will be detected as AB-phase input.
5. This instruction is mainly used to obtain the value of rotation speed and the results in
D
are in
proportion to the rotation speed. Rotation speed
N
can be calculated by the following equation
N
: Rotation speed
n
: The number of pulses produced per rotation
N=
( )
( )
rpm
nt
D
3
10
0 60
×
t
: Detecting time specified by
S
2
(ms)
Program Example:
1. When X7=ON, D2 will count the high-speed pulses from X1. After 1,000ms, it will stop
counting automatically and store the result in D0.
2. After 1000ms of counting has completed, the content of D2 will be reset to 0. When X7 turns
ON again, D2 will begin counting again.