3. CC-Link Communication Function
[SMF-2008-A]
– 3-7 –
3.3. Data Communication Timing Chart
3.3.1. Monitor code
Fig. 3.1. Timing chart for monitor code execution
Enter monitor 1 (RWwn) and monitor 2 (RWwn+1) as monitor codes and turn the monitor output
execution request (RY (n+2) 0) on.
Obtained 32-bit data pieces are divided into the upper 16 bits and lower 16 bits when they are
stored in remote registers.
All data is in hexadecimals. At the time, the monitoring signal (RX (n+2) 0) is turned on
simultaneously.
Monitor data 1, lower 16 bits (RWrn): Lower 16 bits of data requested with monitor 1 (RWwn)
Monitor data 1, upper 16 bits (RWrn+1): Upper 16 bits of data requested with monitor 1 (RWwn)
Monitor data 2, lower 16 bits (RWrn+5): Lower 16 bits of data requested with monitor 2 (RWwn+1)
Monitor data 2, upper 16 bits (RWrn+6): Upper 16 bits of data requested with monitor 2 (RWwn+1)
If there is no data at RWrn+1 and RWrn+6, the sign is acquired.
The sign is "0000" in case of "+" while it is "FFFF" in case of "-."
The monitor data acquired in remote registers are always updated while the monitoring signal (RS
(n+2) 0) remains turned on.
If the monitoring signal (RX (n+2) 0) is turned off, monitor data RWrn, RWrn+1, RWrn+5 and
RWrn+6 is held.
If a monitor code not included in specifications is either monitor 1 (RWwn) or monitor 2 (RWwn+1),
an error code (
1) is set in the response code.
Monitor 2 data, upper 16 bits
(RWrn+6)
Response code
(RWrn+2)
Monitor 2 data, lower 16 bits
(RWrn+5)
Monitor 1 data, upper 16 bits
(RWrn+1)
Monitor 1 data, lower 16 bits
(RWrn)
Monitoring
(RX(n+2)0)
Monitor output execution request
(RY(n+2)0)
Monitor 2
(RWwn+1)
Monitor 1
(RWwn)
OFF
ON
ON
OFF
OFF
OFF
ON
ON
Data hold
