Input Process Section; A2.2.1; Determining Input Value Statuses - YOKOGAWA Admag TI Series User Manual

The IT block is classified into the following five sections for each function:
• Input process section ........ Determines the input value status, converts RATE and ACCUM,
• Adder ................................ Adds the two inputs.
• Integrator .......................... Integrates the result of the adder into the integrated value.
• Output process section ..... Determines the status and value of each output parameter.
• Reset process section ...... Resets the integrated value.
A2.2

Input Process Section

When executed, the IT block first performs input processing. The processing is executed in the
following order: "Determining input status" => "Converting RATE or ACCUM" => "Determining the
input flow direction". Switching between Convert RATE and Convert ACCUM is made using bit
0 (for IN_1) or bit 1 (for IN_2) of INTEG_OPTS. INTEG_OPTS is one of the system parameters,
and should be set by the user.
IN_1 and IN_2 are not be retained if the power is turned OFF.

A2.2.1

Determining Input Value Statuses

The following shows the correlation between the statuses of input parameters (IN_1, IN_2) and
the statuses of input values used in the IT block.
Status of input
parameter (IN_1, IN_2)
Good
Bad
Bad
Uncertain
Uncertain
For addition (see A2.3), if the status of an input value is "Bad", the "Good" value just before the
status changed to "Bad" is used.
* Even if the Use Bad option is applied and the internal status is "Good", the value of "Good" just
before the status changed to "Bad" is used.
<Appendix 2. Integrator (It) Block>
and determines the input flow direction.
Bit4 of INTEG_OPTS
(Use uncertain)
Irrelevant
Irrelevant
Irrelevant
H (=1)
L (=0)
Bit5 of INTEG_OPTS*
(Use Bad)
Irrelevant
H (=1)
L (=0)
Irrelevant
Irrelevant
242
Status of input value
handled in the IT block
Good
Good
Bad
Good
Bad
IM 01E21A02-03EN