Input Assignment For High Speed Counters - Mitsubishi FX3U Series Programming Manual

FX /FX Series Programmable Controllers
3U 3UC
Programming Manual - Basic & Applied Instruction Edition
4.7.2

Input assignment for high speed counters

Inputs X000 to X007 are assigned as shown in the table below according to each high speed counter number.
When a high speed counter is used, the filter constant of a corresponding input number in the main unit
automatically changes (X000 to X005: 5 µs, X006 and X007: 50 µs). Input terminals not used for high speed
counters, however, can be used as general inputs.
When FX -4HSX-ADP unit is connected to an FX
3U
below are assigned to the first FX
FX -4HSX-ADP unit.
3U
→ For the input specifications of the FX
→ For the input specifications of the main unit, refer to the Hardware Manual of the main unit.
Counter No.
C235
C236
C237
C238
C239
1-phase
C240
1-count-
C241
ing input
C242
C243
C244
C244(OP)
C245
C245(OP)
C246
C247
1-phase
C248
2-count-
C248(OP)
ing input
C249
C250
C251
C252
2-phase
2-count-
C253
ing
C253(OP)
4
input*
C254
C255
H/W: Hardware counter S/W: Software counter
A: A phase input
*1. Cautions on wiring should be considered for these high speed counters.
*2. Hardware counters are switched to software counters when a comparison set/reset instruction for high
speed counter (DHSCS, DHSCR, DHSZ or DHSCT) is combined.
The counter C253 is switched to a software counter when the logic of the external reset input signal is
reversed.
*3. When a special auxiliary relay is driven in a program, input terminal in use and those functions are
switched.
→ For the method to use a software counter as a hardware counter, refer to Subsection 4.7.7.
*4. In a 2-phase 2-counting input counter, the edge count is usually 1. But the edge count can be set to 4
by combining a special auxiliary relay.
-4HSX-ADP unit, and other input terminals are assigned to the second
3U
Classifica-
tion
X000
*1 *2
U/D
H/W
*1 *2
H/W
*1 *2
H/W
*1 *2
H/W
*1 *2
H/W
*1 *2
H/W
S/W
U/D
S/W
S/W
S/W U/D
*3 *2
H/W
S/W
*3 *2
H/W
*1 *2
U
H/W
S/W U
S/W
*1*3 *2
H/W
S/W U
S/W
*1 *2
A
H/W
S/W A
*1 *2
H/W
*3
S/W
S/W A
S/W
B: B phase input
→ For the wiring, refer to the Hardware Manual of the main unit.
→ For the condition handled as software counters, refer to Subsection 4.7.9.
→ For the method to use a 2-phase 2-counting input counter with edge count of 4,
PLC, input terminals inside bold-line frames in the table
3U
-4HSX-ADP, refer to the FX
3U
Input terminal assignment
X001 X002 X003 X004
U/D
U/D
U/D
U/D
R
U/D R
U/D
R
U/D R
D
D R
U D
U D
D R
U D
B
B R
A B
A B
B R
A B
U: Up-counting input
R: External reset input S: External start input
4 Devices in Detail
4.7 High Speed Counter [C]
Hardware Manual.
3U
X005 X006 X007
U/D
R
S
U/D
S
U/D
R
S
R S
R
S
R S
D: Down-counting input
refer to Subsection 4.7.8.
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