19
DL30-G USERS MANUAL EM-8571-G Rev.2
2.4 Explanation about basic working and terms
Term
Explanation
Channel
CH
5 types of input channels, 2 types of output channels, and grouped digital output are
defined in DL30-G. The I/O signals are in the form of fully encoded digital data.
AI
DI
PI
MA
MD
AO
DO
GDO
: Analog input (16 bit signed integer, unsigned integer)
: Discrete input (1 bit)
: Pulse input (32 bit unsigned integer, signed integer, floating point)
: Function input (32 bit floating point)
: Function input (1 bit)
: Analog output (16 bit signed integer)
: Discrete output (1 bit)
: Grouped digital output
Pen
Pens are used for trend graph, data logging, and report forms.
Channels are assigned to pens, respectively when the DL30-G stores trend waveforms
and data values, and generates report forms.
Alarm zone transition
For AI, PI, and MA, the allowable range of input values can be divided into a maximum
of 5 zones. The shift between zones caused by a change in the input value is called
'alarm zone transition'.
DI and MD can only be ON/OFF, and hence a change in the input signal is equivalent to
an alarm zone transition.
Event
Indicates the information that [There has been an alarm zone transition].
Trend
Indicates the waveform data assigned to the pen and recorded.
Logging data
Indicates the history of data values at the point of each storing cycle for the respective
channels assigned to pens.
Event data
Includes 'Event Log', 'System Log', and 'Communication Log'.
Event log : Data of events listed in chronological order of occurrence
System log : Data of the internal system activities listed in chronological order
Communication log: Data of communication results listed in chronological order
Schedule log : Data of execution and/or change of schedules listed in chronologi-
cal order
Report form data
Indicates the data integrated by day, month, or year for the channels assigned to pens.
Internal memory
When the DL30-G records data, trend data, logging data, event data, and report form
data are recorded in the internal nonvolatile memory of the device.
This memory is called 'internal memory'.
Sampling rate
The time cycles used for acquiring I/O values for logging by the DL30-G; fixed at 1
second.
Storing rate
The time cycles used for recording I/O values for logging data and report form data.
Data acquired at the sampling rate are computed and stored in the storing rate.
Mail template
Specific combinations of Subject, Body, and Mail recipients can be predefined and
stored. Each set is identified by the mail template number.