Honeywell®Mercury OPC Items
Standard Items
Protocol Items
The Mercury protocol implementation supports the item names listed below for use by client applications.
When using the 3 or 4 digit Item number, please refer to the OEM documentation for your Mercury device for the items applicable to your device.
Item | Data Type | Description |
|---|---|---|
Item # | I2,I4,R4, UI2,BOOL, STRING | Item # is specified by 3 or 4 decimal digits. For Items that are applicable to your device, refer to the OEM documentation. |
L Item # | R4 | Takes a live reading of the instrument’s current measured value on the specified item. Valid items are L008, L026, L031, L420, L500, L501, L502, and L503. |
BadSignOff | I2 | Returns the number of failed Sign-offs. Write a zero to reset. |
BadSignOn | I2 | Returns the number of failed Sign-ons. Write a zero to reset. |
BadSiteIdCounter | I2 | Returns the number of Site ID mis-match errors. Write a zero to reset. |
GoodSignOff | I2 | Returns the number of successful Sign-offs. Write a zero to reset. |
GoodSignOn | I2 | Returns the number of successful Sign-ons. Write a zero to reset. |
LastError | I2 | Returns the most recently occurred error code. |
ModemAlarm | I2 | Modem Alarm value. |
ModemAlarmClear | I2 | Queue task to clear modem alarm. |
ModemLowBattery | I2 | Modem low battery alarm value. |
Register items are validated by the field device during the item's first poll. If the field device reports that the item number is not applicable, by returning an error, the Mercury protocol module will internally flag the item as invalid and will not add it to future poll messages. This item flag can be reset by disabling the ACM device object, then re-enabling it.
Extended Items
The Mercury protocol implementation supports the item names listed below for use by client applications.
Item | Data Type | Description |
|---|---|---|
LastAlarmRecord | Date | Timestamp of the last alarm record retrieved. |
LastEventRecord | Date | Timestamp of the last event record retrieved. |
LastHourlyRecord/<audit> | Date | Timestamp of the last hourly record retrieved from audit specified. Audit is one based. Ex: "LastHouryRecord/1". |
LastTimeSync | Date | Timestamp of the last time synchronization attempt. |
LastTimeSyncResult | I4 | Result of the last time synchronization attempt. |
RequestAuditItems | I2 | Read the Audit Configuration items during the next history upload. Write a value of 1 to initiate. |
RequestDeviceConfig | I2 | Read the Device Configuration items during the next history upload. Write a value of 1 to initiate. |
RequestMeterConfig | I2 | Read the Meter EFM Configuration items during the next history upload. Write a value of 1 to initiate. |
ResetAlarm | I2 | Erase the alarm history retrieval pointer (and re-collect all alarm history during the next retrieval). Write a value of 1 to initiate. |
ResetAudit/<audit> | I2 | Erase the audit history retrieval pointer for audit specified (and re-collect all audit history during the next retrieval). Audit is one based. Ex: "ResetAudit/1". Write a value of 1 to initiate. |
ResetEvent | I2 | Erase the event history retrieval pointer (and re-collect all event history during the next retrieval). Write a value of 1 to initiate. |
RetrieveHistory | I2 | Retrieve enabled history. Write a value of 1 to initiate. |
RetrieveHistoryCancel | I2 | Cancel the retrieval of enabled history. Write a value of 1 to initiate. |
TimeSync | I2 | Perform time synchronization. Write a value of 1 to initiate. |
For assistance, please submit a ticket via our Support Portal, email autosol.support@autosoln.com or call 281.286.6017 to speak to a support team member.