Mitsubishi Q2ACPU User Manual page 188

10. OTHER FUNCTIONS
(5) Special relays and special registers for reading/writing clock data
The section explains the special relays and special registers used for setting data
and reading clock data for clock operation.
(a) Special relays used for the clock function
Device
SM210 Clock data set request
SM211 Clock data error
*1
Clock data display
SM212
SM213 Clock data read request
*1 Can only be used with the Q3ACPU and Q4ACPU.
Name
• Writes clock data to the special registers (SD210 to
SD213) and performs clock operation.
• Writes the clock data stored in SD210 to SD213 to the
clock elements after execution of the END instruction in
the scan in which SM210 turns from OFF to ON.
• Used to determine whether or not there are any errors
when the clock data is set.
• Turns ON if any data is not a BCD cord.
• Displays clock data on the LED indicator on the front
panel of a CPU module.
• When SM212 is ON, the clock data is displayed on the
LED indicator on the front panel of the CPU module.
• Reads the clock data stored in special registers SD210
to SD213.
• When SM213 is ON, the clock data is read to SD210 to
SD213 after execution of the END instruction.
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Description