Reference Manual
00809-0400-4728, Rev AA June 2011
Rosemount 644
AI Parameter Table
Table
| Index |
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Parameter | No. | Available Values | Units | Default | Read/Write | Description |
ACK_OPTION | 23 | 0 = Auto Ack Disabled | None | 0 all Disabled | Read and Write | Used to set auto acknowledgment of alarms. |
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| 1 = Auto Ack Enabled |
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ALARM_HYS | 24 | 0 – 50 | Percent | 0.5 | Read and Write | The amount the alarm value must return within |
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| the alarm limit before the associated active alarm |
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| condition clears. |
ALM_SEL | 38 | HI_HI, HI, LO, LO_LO | None | Non selected | Read and Write | Used to select the process alarm conditions that |
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| will cause the OUT_D parameter to be set. |
ALARM_SUM | 22 | Enable/Disable | None | Enable | Read and Write | The summary alarm is used for all process |
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| alarms in the block. The cause of the alert is |
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| entered in the subcode field. The first alert to |
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| become active will set the Active status in the |
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| Status parameter. As soon as the Unreported |
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| status is cleared by the alert reporting task, |
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| another block alert may be reported without |
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| clearing the Active status, if the subcode |
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| has changed. |
ALERT_KEY | 04 | 1 – 255 | None | 0 | Read and Write | The identification number of the plant unit. This |
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| information may be used in the host for sorting |
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| alarms, etc. |
BLOCK_ALM | 21 | Not applicable | None | Not applicable | Read only | The block alarm is used for all configuration, |
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| hardware, connection failure or system problems |
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| in the block. The cause of the alert is entered in |
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| the subcode field. The first alert to become active |
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| will set the Active status in the Status parameter. |
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| As soon as the Unreported status is cleared by |
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| the alert reporting task, another block alert may |
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| be reported without clearing the Active status, if |
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| the subcode has changed. |
BLOCK_ERR | 06 | Not applicable | None | Not applicable | Read only | This parameter reflects the error status |
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| associated with the hardware or software |
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| components associated with a block. It is a bit |
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| string, so that multiple errors may be shown. |
CAP_STDDEV | 40 | > = 0 | Seconds | 0 | Read and Write | The time over which the VAR_INDEX is |
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| evaluated. |
CHANNEL | 15 | 1 = Pressure | None | AI(1): Channel = 1 | Read and Write | The CHANNEL value is used to select the |
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| 2 = Housing |
| AI2: Channel = 2 |
| measurement value. Refer to the appropriate |
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| temperature |
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| device manual for information about the specific |
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| channels available in each device. |
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| You must configure the CHANNEL parameter |
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| before you can configure the XD_SCALE |
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| parameter. |
FIELD_VAL | 19 | 0 – 100 | Percent | Not applicable | Read only | The value and status from the transducer block |
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| or from the simulated input when simulation is |
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| enabled. |
GRANT_DENY | 12 | Program | None | Not applicable | Read and Write | Normally the operator has permission to write to |
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| Tune |
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| parameter values, but Program or Local remove |
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| Alarm |
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| that permission and give it to the host controller |
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| Local |
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| or a local control panel. |
HI_ALM | 34 | Not applicable | None | Not applicable | Read only | The HI alarm data, which includes a value of the |
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| alarm, a timestamp of occurrence and the state |
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| of the alarm. |
HI_HI_ALM | 33 | Not applicable | None | Not applicable | Read only | The HI HI alarm data, which includes a value of |
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| the alarm, a timestamp of occurrence and the |
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| state of the alarm. |
HI_HI_LIM | 26 | Out_Scale(2) | Out_Scale(2) | Not applicable | Read and Write | The setting for the alarm limit used to detect the |
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| HI HI alarm condition. |
HI_HI_PRI | 25 | 0 – 15 | None | 1 | Read and Write | The priority of the HI HI alarm. |
HI_LIM | 28 | Out_Scale(2) | Out_Scale(2) | Not applicable | Read and Write | The setting for the alarm limit used to detect the |
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| HI alarm condition. |
HI_PRI | 27 | 0 – 15 | None | 1 | Read and Write | The priority of the HI alarm. |
IO_OPTS | 13 | Low Cutoff | None | Disable | Read and Write | Allows the selection of input/output options used |
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| Enable/Disable |
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| to alter the PV. Low cutoff enabled is the only |
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| selectable option. |
L_TYPE | 16 | Direct | None | Direct | Read and Write | Linearization type. Determines whether the field |
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| Indirect |
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| value is used directly (Direct), is converted |
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| Indirect Square Root |
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| linearly (Indirect), or is converted with the square |
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| root (Indirect Square Root). |
