Input Assignment For High-Speed Counters - Mitsubishi Electric FX3G SERIES Programming Manual

FX /FX /FX Series Programmable Controllers
3G 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
are assigned to the first FX
unit.
Counter No.
C235
C236
C237
C238
C239
1-phase
C240
1-count
C241
input
C242
C243
C244
C244(OP)
C245
C245(OP)
C246
C247
1-phase
C248
2-count
C248(OP)
input
C249
C250
C251
C252
2-phase
C253
2-count
4 C253(OP)
input*
C254
C255
H/W: Hardware 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 used.
The counter C253 is switched to a software counter when the logic of the external reset input signal is
reversed.
→ For the condition under which it is handled as a software counter, refer to Subsection 4.7.9.
*3. When a special auxiliary relay is driven in a program, the input terminals and their associated 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-count 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 FX
3U
→ For the input specifications of the FX
→ For the input specifications of the main unit, refer to the Hardware Edition of the main unit.
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
S/W: Software counter
B: B phase input
→ For the method on how to use a 2-phase 2-count input counter with on edge count of 4,
4.7 High-Speed Counter [C] (FX3U/FX3UC PLC)
PLC, input terminals inside bold-line frames in the table below
3U
-4HSX-ADP, refer to the FX
3U
Input terminal assignment
X001 X002 X003 X004
U/D
U/D
U/D
R
U/D R
R
U/D R
D
D R
U
U
D R
U
B
B R
A
A
B R
A
U: Up-counting input
R: External reset input
→ For the wiring, refer to the Hardware Edition of the main unit.
4 Devices in Detail
-4HSX-ADP
3U
Hardware Edition.
3U
X005 X006 X007
U/D
U/D
U/D R
S
U/D
S
U/D
D R
D
S
D R S
B R
B
S
B R S
D: Down-counting input
S: External start input
refer to Subsection 4.7.8.
1
2
3
4
5
6
7
8
9
10
105