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5. BLOCK SETTING
5-2
All Rights Reserved. Copyright © 2006, Rota Yokogawa
IM 01R01B02-01E-E 5th edition October 01, 2020-00
DIAG_EVENT_SWITCH:
This parameter enables changing of status and diagnosis handling in Condensed Status and Diagnosis
state. It allows the user to set the event handling according to user’s needs.
5.3 Analog Input (AI) Block Parameters
All important AI Block parameters are listed below and described with more details to guide through the
settings.
TARGET_MODE:
Indicates what mode of operation is desired for the AI Function Block. The AI Function Block modes are:
• Out of Service (O/S)
• Manual (MAN)
• Auto (AUTO)
MODE_BLK:
The sub-parameter “Actual” indicates the actual mode which is one of the available modes of the
TARGET _MODE. The actual mode may differ from the target mode (e.g. affected by block mode setting of
Physical Block):
• Out of Service: the AI Block does not operate.
• Manual: Allows manual setting of the parameter OUT by the user. It does not allow automatic updated.
• Auto: Causes the OUT parameter to be updated automatically.
CHANNEL:
Defines the output parameter of the transducer block to be input to the AI block. AI block is assigned to:
• Volumetric flow rate
• Mass flow rate
OUT:
This parameter contains the value and the status used for cyclic data transfer. The content depends on several
settings and status handling. It is writable in block mode: MAN.
OUT_SCALE:
Defines the output scale (range and unit). The output range needs setting from 0 % to 100 %. Available units
are defined in chapter 5.4.
PV_SCALE:
Defines the input scale from the transducer block. The engineering unit of PV_SCALE high and low scale
values are direct related to the VOLUME_FLOW_UNIT resp. MASS_FLOW_UNIT of the Transducer block.
The unit is determined by order and printed on the indicator scale. Available units are defined in chapter 5.4.
PV_FTIME:
Sets the time constant of the damping function within AI block (primary delay) in seconds.
FSAFE_TYPE:
Used to set the handling of the AI block in case of “BAD” status messages, depending on the setting OUT
value and status are affected as defined below:
• “0”: Value: FSAFE_VALUE, Status: UNCERTAIN - Substitute Value
• “1”: Value: last stored valid value, Status: UNCERTAIN - last usable value
• “2”: Value: actual, Status: no adjustment
NOTE
Depending on COND_STATUS_DIAG setting the OUT status differs.