Mitsubishi Electric MELSEC iQ-R04ENCPU - Reading of the Long Timer and Long Retentive Timer; Writing of the Long Timer and Long Retentive Timer

1 FUNCTIONS
1.7 Communications Using MODBUS/TCP
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1
■Reading of the long timer and long retentive timer
Note that the following items cannot be set for reading the long timer and long retentive timer.
• Long timer (contact)
• Long timer (coil)
• Long retentive timer (contact)
• Long retentive timer (coil)
When, however, the current value of the long timer or long retentive timer is set in units of four words, the contact and coil will
be read simultaneously.
As shown above, the long timer and long retentive timer use the data configuration of four words per device. Consequently,
specify the number of device points for a request data in units of four points.
■Writing of the long timer and long retentive timer
Note that the long timer and long retentive timer cannot be set.
Response data Description
1st word The current value is stored.
2nd word
3rd word • b0: The value of the coil is stored.
• b1: The value of the contact is stored.
• b2 to b15: Used by the system.
4th word Used by the system.