Mitsubishi FX2-16E series, User Manual

Page: 217 / 520

FX
3U
Series Programmable Controllers
User’s Manual - Hardware Edition
209
11 Use of High-speed Counters (C235 to C255)
11.4 List of Device Numbers and Functions
11
Hi
gh
-Speed
Counters
12
O
utput W
iri
ng
13
W
iri
ng for
V
ari
ous
Us
es
14
Te
st R
un,
Mai
nten
ance, T
roubl
es
hooti
ng
15
IInput/Output Pow
ered
Exte
nsi
on U
nit
s
16
Input/O
utput
Extens
ion
Bl
ock
s
17
Extension Power Suppl
y
Un
it
18
Other Extens
ion
Uni
ts an
d
Opti
ons
19
D
isplay M
od
ule
20
Te
rminal
Bl
oc
k
11.4 List of Device Numbers and Functions
→
For details on the counter number (OP), refer to Subsection 11.3.3.
*1. These counters are handled as software counters depending on working conditions. When they are
handled as software counters, they have limitations on maximum response frequency and overall
frequency.
→
For the conditions under which they are handled as software counter, refer to Section 11.8.
→
For the overall frequency, refer to Section 11.9.
*2. When the input terminals of the main unit receive pulses with a response frequency of 50 kHz to
100 kHz, wire the terminals as stated below.
-
The wiring length should be 5m (16’4") or less.
- Connect a bleeder resistance of 1.5k
Ω
(1W or more) to the input terminal, so that the load current
of the open collector transistor output on the mating device side is 20mA or more.
→
For the wiring, refer to Section 11.10.
*3. C244, C245 and C248 are useally used as software counters. When they are used in combination
with special auxiliary relays (M8388 and M8390 to M8392), they can be used as hardware counters
C244(OP), C245(OP) and C248(OP).
→
For the procedures on switching the counter function, refer to Subsection 11.11.3.
*4. The 2-phase 2-input counters are 1 edge count counters. When they are used in combination with
special auxiliary relays (M8388, M8198 and M8199), they can be used as 4 edge count counters.
→
For the procedures on using them as 4 edge count counters, refer to Subsection 11.11.4.
Counter
type
Device No.
(counter)
Classification
1 edge count/
4 edge count
Data length
External reset
input terminal External start
input terminal
1-phase
1-count
input
C235
*2
C236
*2
C237
*2
C238
*2
C239
*2
C240
*2
Hardware
counter
*1
−
32-bit
bi-directional
counter
None None
C244(OP)
*3
C245(OP)
*3
−
C241
C242
C243
Software
counter
−
Provided
*5
None
C244
*3
C245
*3
−
Provided
*5
Provided
1-phase
2-count
input
C246
*2
C248(OP)
*2*3
Hardware
counter
*1
−
32-bit
bi-directional
counter
None None
C247
C248
*3
Software
counter
−
Provided
*5
None
C249
C250
−
Provided
*5
Provided
2-phase
2-count
input
C251
*2
Hardware
counter
*1
1 edge count
*4
32-bit
bi-directional
counter
None
None
4 edge count
*4
C253
*2
1 edge count
*4
Provided
*5
4 edge count
*4
C252
Software
counter
1 edge count
*4
Provided
*5
None
4 edge count
*4
C253(OP)
*6
1 edge count
*4
None
4 edge count
*4
C254
C255
1 edge count
*4
Provided
*5
Provided
4 edge count
*4