10-12 Advanced Usage of the HTML TagTable 10-4 – System Symbol Names (ILON_ Prefix) Used to Obtain Memory InformationWeb Tag Symbol DescriptioniLon_Mem_RequestPartTotal Total memory allocated to process requests.iLon_Mem_RequestPartFree Free memory in a request partition.iLon_Mem_RequestPartLargest Largest free block in a request partition.iLon_Mem_RequestPartUsed Used memory in a request partition.iLon_Mem_GlobalPartTotal Total global memory allocated.iLon_Mem_GlobalPartFree Free memory in a global partition.iLon_Mem_GlobalPartLargest Largest free block in the global partition.iLon_Mem_GlobalPartUsed Used memory in a global request partition.Web Tag AttributesWhen a network variable is specified with the NVL_ or NVE_ symbol in the SYMBOL=attribute of the tag, four optional attributes may be used to further define how anetwork variable is displayed or changed.• FIELD:• FORMAT:• PROPAGATE:• WAIT:The attributes may be used in any combination within a single tag with theexception of WAIT:. WAIT: must be used in conjunction with PROPAGATE:. The colon (:) isrequired as part of the syntax. If web tag attributes are used, use the exclamation point (!) todelimit the attributes. For example: FUNC=TextFieldSYMBOL=NVL_DigitalOut!FIELD:value!PROPAGATE:TRUE> The web tag in the example above will display the contents of the field called valuecontained in the local network variable, Digital_Out. The value will be displayed as a read-write value in a text field. If the form containing this text field is submitted, the new valuewill be propagated onto the network immediately.FIELD:Network variables may contain fields that vary according to the network variable type. Thecontents of these fields can be displayed and changed by specifying the field name with theFIELD: attribute.For example, the Standard Network Variable Type (SNVT) SNVT_switch contains two fields:value and state. To display the contents of the value field in the local network variableDigitalOut, use the following tag. FUNC=ShowValue SYMBOL=NVL_DigitalOut!FIELD:value>
