Specifications

OPERATIONS
Page 71 MRC-565 Packet Data Radio Operations & Maintenance
The CR10X mode uses the group ID assigned in the CR10X by using the P80,p1,p2 instruction
in the CR10X DLD File, where the 1st parameter selects Final Storage area 1, and the 2nd
parameter defines the group (array ID) number. These can be assigned from 0 to 15.
5.7.8 Time of Day
To send the MRC-565 time to the CR10X, enter (or schedule) a UPDT,TIME command. This
will not be done when a time probe is received from the master station, as it might cause a skip
in the data acquisition cycle. It should be scheduled to happen at a convenient time of day or
interval using the MRC-565 SCHED command such that data will not be lost if the time
advances or retards across an acquisition interval. If the time update is more than +/- two minutes
from the current CR10X time, then a time resync message will be transmitted to the default
destination.
5.7.9 Time Tagging
The time tag assigned to each group report can be taken from the MRC-565 internal date and
time as the data is read, or it can use a CR10X internal time stored in the data array.
To use the CR10x internal time, the date and time in the CR10X DLD File must be set up in
each group as the first two sensor values of the group using the code "110" in the P77
instruction. This records the Julian day as the first sensor, and the Hour/Minute as the second
sensor. The maximum number of sensors would then be 18, and actual data would be in sensors
3-18 for 16 values. The MRC-565 will use sensor slots 1-16 for this data rather than 3-18. The
time tag is placed in the data report header.
If the MRC-565 time is used, actual sensor data can be recorded in sensors 1-16. If the data
array has the time in each record, but you use the MRC-565 time stamp, then the 1st two sensors
which actually contain the CR10X date and time will be treated as the 1st two sensor values.
There is no option to skip the 1st two data array values in this case, except to use the CR10X
time tag mode.
5.7.10 Memory Management
Each time the MRC-565 reads data from the CR10X, it saves the last data pointer accessed in the
CR10X’s Final Storage RAM. This is used at the next scheduled update interval to get the next
data values without missing anything.
If there is no new data recorded in the Final Storage area when the MRC-565 scans, then nothing
is transmitted. The MRC-565 will try again at the next interval. The interval can be set from 1 to
32767 seconds. A good typical value to use is 60 seconds.