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MELSEC-Q
3 SPECIFICATIONS
3.3.2 I/O signal details
The following are details of the Q64RD/Q64RD-G I/O signals.
(1) Input signals
Device No.
Signal Name
Description
X0
Module Ready
(1) If the module is in the normal mode at power-on or resetting of the programmable controller
CPU, this signal turns on to start temperature conversion as soon as it gets ready.
(2) When this signal (X0) is off in the normal mode, temperature conversion is not performed. In the
offset/gain setting mode, temperature conversion is performed even if this signal (X0) is off.
(3) This signal (X0) turns off when:
• The module is in the offset/gain setting mode;
• The Q64RD/Q64RD-G is in a watchdog timer error 1
X1
X2
X3
X4
CH Offset/Gain
Setting Status Signal
(1) This signal is used as an interlock condition to turn on/off the CH Offset Setting Request (Y1,
Y3, Y5, Y7)/CH Gain Setting Request (Y2, Y4, Y6, Y8) when offset/gain setting is made.
(2) When the CH Offset Setting Request (Y1, Y3, Y5, Y7) or CH Gain Setting Request (Y2,
Y4, Y6, Y8) is turned from ON to OFF in the offset/gain setting mode, this signal (X1 to 4)
corresponding to the user-set, conversion-enabled channel turns on.
CH Offset/Gain Setting
Status Signal (X1 to 4)
CH Offset Setting
Request (Y1, Y3, Y5, Y7)
CH Offset/Gain Setting
Status Signal (X1 to 4)
CH Gain Setting Request
(Y2, Y4, Y6, Y8)
X9
Operating Condition
Setting Completion
Signal
(1) This signal is used as an interlock condition to turn on/off the Operating Condition Setting
Request (Y9) when the "Conversion enable/disable setting", "CH time/count/moving
average/time constant setting (Q64RD-G)", "averaging processing specification" , "Extended
averaging processing specification", "Warning output enable/disable setting", "CH scaling
range upper/lower limit value", "CH scaling width upper/lower limit value", "CH warning
output upper/lower limit value", "Conversion setting for disconnection detection" or
"CH Conversion setting value for disconnection detection" is changed.
(2) Conversion processing is not performed when this signal (X9) is off.
(3) This signal (X9) turns off when:
• The Module Ready (X0) is off in the normal mode; or
• The Operating Condition Setting Request (Y9) is on.
Module Ready(X0)
Operating Condition Setting Completion
Signal (X9)
Operating Condition Setting Request (Y9)
Conversion enable/disable setting
(buffer memory addresses 0: Un\G0)
Conversion Completion Flag (XE)
Conversion
disable
Conversion
enable
(4) The Q64RD-G clears measured temperature values immediately after Operating Condition
Setting Request (Y9) turned ON. Therefore, before reading measured temperature values,
confirm that Conversion Completion Flag (XE) has turned ON. The Q64RD holds measured
temperature values immediately after Operating Condition Setting Request (Y9) turned ON.
1 Occurs if program operation is not completed within the intended time due to a
hardware fault of the Q64RD/Q64RD-G. The RUN LED of the Q64RD/Q64RD-G
goes off when a watchdog timer error occurs.
Summary of Contents for q64rd
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