Specifications

Table Of Contents
OPERATIONS
Page 83 MRC-565 Packet Data Radio Operations & Maintenance
the final storage at the desired interval. The interval is synchronized with time-of-day so that an
interval of 10 seconds (for example) falls on 0, 10, 20, 30, 40, 50 seconds of each minute. The
interval can be set more often than data is recorded in the Final Storage and if there is no new
data since the last scan, nothing will get queued for transmission.
5.8.6 Transmission Order
The order of transmission is currently limited to FIFO, but provision has been made for a later
version to support LIFO.
5.8.7 Group ID Assignment
The group number is calculated from the order that the Data Tables are created inside the
CR1000 Basic program. The first Table defined is group 1, the second Table is group 2, etc.
There can be up to 16 Data Tables, and each Table can have up to 16 sensors. The sensor values
must be limited to 16 bits each. The CR1000 Basic program should use FP2 or UINT2 as the
data type for each sensor.
5.8.8 Time of Day
To send the radio time to the CR1000 enter (or schedule) an UPDT, TIME command. The time
update does not automatically happen when a time probe is received from the master station, as it
might cause a skip in the data acquisition cycle. The UPDT,TIME should be scheduled to
happen at a convenient time of day or interval using the radios SCHED command so 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 CR1000 time then a time-resync message will be
transmitted to the default destination.
5.8.9 Time Tagging
The time tag assigned to each group report can be taken from the RADIO internal date and time
as the data is read, or it can use a CR1000 internal time stored in the data table. Use of the
CR1000 internal time is the normal option. Each record of each data table record is time-tagged
with a unique data and time tag. If the radios time is used, the date and time from the table will
be ignored, and the actual radios local time (at the moment of readout from the CR1000) will be
used.