MELSEC-A
3. SPECIFICATIONS
3 - 12
3.5 I/O Signals Transferred to/from the Master Module
This section explains the input/output signals (RX, RY) of the high-speed counter
module transferred to/from the master module.
(1) Input signals
The following table lists the input signals of the high-speed counter module
transmitted to the master module.
Input Signals
Signal Name
High-speed counter module
master module
Description Refer
To
CH1 CH2
RXn0 RXn4
Counter value greater
(point No. 1)
Turned on if the counter value is greater than the set
value No. 1.
Section 6.1
RXn1 RXn5
Counter value coincidence
(point No. 1)
Latched on if the counter value is equal to the set value
No. 1 turned off by the coincidence signal reset
command.
Section 6.1
Section 8.1
RXn2
RXn6
Counter value less (point No. 1)
Turned on when the counter value is less than the set
value No. 1.
Section 6.1
RXn3 RXn7
External preset
command detection
Latched on when the preset request is given from
external input. Turned off by the external preset
detection reset command.
Section 7.3
RXn8 RXnB
Counter value greater
(point No. 2)
Turned on if the counter value is greater than the set
value No. 2.
Section 6.1
RXn9 RXnC
Counter value coincidence
(point No. 2)
Latched on if the counter value is equal to the set value
No. 2 turned off by the coincidence signal reset
command.
RXnA
RXnD
Counter value less (point No. 2)
Turned on when the counter value is less than the set
value No. 2.
RXnE RXnF
———
Unusable
———
RX(n+1)0 RX(n+1)2
Preset
completion
Turned on on completion of the preset function
executed when the preset command
{(RY(n+1)1(RY(n+1)8)} turns on.
Turned off when the preset command switches from ON
to OFF.
Section 7.2
RX(n+1)1 RX(n+1)3
Counter
function
detection
Turned on at counter function start (execution) when the
counter function selection start command
{(RY(n+1)6(RY(n+1)D)} turns on.
Turned off when the counter function selection start
command switches from ON to OFF.
Section 9.2
Section 9.3
Section 9.4
Section 9.5
RX(n+1)4 to RX(n+7)7
———
Unusable
———
RX(n+7)8
Initial data processing request flag
Turned on by the high-speed counter module to request
initial data setting after power-on or hardware reset.
Turned off on initial data processing completion (when
initial data processing completion flag (RY(N+7)8) turns
on).
RX(n+7)9 to RX(n+7)A
———
Unusable
RX(n+7)B Remote
ready
Turned on when the high-speed counter module is in
the ready state on completion of initial data setting after
power-on or hardware reset.
RX(n+7)C to RX(n+7)F
———
Unusable
n: Address assigned to the master station by station number setting.
POINT
The unusable devices are used in the system and should not be used by the
user.
If any of them is used by the user, normal operation cannot be guaranteed.
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