Rockwell Automation 284 ArmorStart User Manual - Manual (Page 278)

11-10 ArmorStart® to ArmorPoint® Connectivity
Triggering a System Wide Write
Once a successful System Wide Read has been initiated and the
Read_All_System_Done_Flag bit is energized, a System Wide Write
can be triggered. To trigger the system wide write, the contact
Write_All_Condition_Here needs to be energized in the ladder logic.
This can be done through additional logic or simply by energizing the
bit on-line, in the RSLogix5000 software, Controller Tag monitor
screen. The Write_All_Condition_Here is handled as a one shot
inside the logic, but should be de-energized at a later time. This is so a
System Wide Write is not triggered after every Logix power cycle or
for each transition from Program to RUN mode. When the write
finishes successfully, the Write_All_System_Done_Flag bit
energizes in the logic. If an error occurs during the write, the
Write_All_System_Error_Flag bit energizes and the error will be
logged into the structure called Error_Report.
Interpreting the Error Report
If an error occurs during the operation of the ladder logic, either the
Write_All_System_Error_Flag or Read_All_System_Error_Flag
bits will energize depending on which function was being triggered.
Information will be logged inside the data structure Error_Report,
that will aid in troubleshooting the problem. The format of this
structure is shown below.
Figure 11.13Error Report
The first element of this structure is .Local_Error and will contain a
number corresponding to an error interpretation. The error numbers
are described below.
Table 11.1 Error Definitions
Error
No.
Error Description
0 Success. Function completed successfully.
1 Read Number Parameter Error. Num_Devices element in the configuration is either 0 or
greater than the Max_Devices element.
2 Read Message Block Error. The Message block doing the data reads returned back an
error. Look at the Msg_Error and Msg_Ext_Error fields for the errors reported by the
message.
3 Write Data out of Limits. The value of the data to be written is either less than the
Min_value or greater than the Max_value.
4 Write Message Block Error. The Message block doing the data writes returned back an
error. Look at the Msg_Error and Msg_Ext_Error fields for the errors reported by the
message.
5 Write Disallowed. The System Wide Write attempted without a successful System Wide
Read done first.
6 Data Write Error. The data read back after a parameter write, does not match.
7 Number of Parameters Error. The number of parameters read from an ArmorStart is
greater than the Max_Devices element in the structure.