【背景】
在看一些DDL文件，是EDDL的语法。
比如，这个ddl可供参考：
http://forums.ni.com/attachments/ni/120/321/2/DevwithMethods.txt
其中，就有这样的代码：
VARIABLE press_flags
{
LABEL "|en|PRESS_FLAGS" ;
HELP "|en|Variable used to report pressure sensor alarm conditions.";
TYPE BIT_ENUMERATED (1)
{
{ 0x10, "|en|Output Port 2 Sensor Failure","|en|" },
{ 0x20, "|en|Output Port 1 Sensor Failure","|en|" },
/*{ 0x40, "|en|Supply Sensor Failure","|en|" }, -- no longer used in Control Board.*/
{ 0x80, "|en|Loss of Supply","|en|" }
}
CONSTANT_UNIT [blank] ;
CLASS CONTAINED & DYNAMIC ;
HANDLING READ ;
/* RESPONSE_CODES xxx ; */
}
VARIABLE press_units
{
LABEL "|en|PRESS_UNITS" ;
HELP "|en|Variable used to select pressure-reading units.";
TYPE ENUMERATED (1)
{
_UNINITIALIZED_VALUE,
{ 6, "|en|psi", "|en|" },
{ 7, "|en|bar", "|en|" },
{ 10, "|en|Kg/cm2 ", "|en|" },
{ 12, "|en|Kpa", "|en|" }
}
CONSTANT_UNIT [blank] ;
CLASS CONTAINED ;
HANDLING READ & WRITE ;
/* RESPONSE_CODES xxx ; */
}对于其中的CLASS部分，其值，目前已经发现的有CONTAINED，DYNAMIC。
想要找到，其他还有哪些类型的值。
【解决过程】
1.不用多想，肯定是EDDL的语法。
2。之前就找到了，关于EDDL的的官网手册：
然后后来就找到了，对应的语法的解释：
7.19.2.2 CLASS Purpose CLASS attribute specifies the effect of a METHOD on a field device. This attribute is intended to be used by the EDD application to implem ent permission levels and organize how METHODs are presented. METHOD classes are identical to VARIABLE classes.
Lexical structure DISCRETE, DYNAMIC, FREQUENCY, HART, INPUT, LOCAL, LOCAL_DISPLAY, OUTPUT, OPERATE, SENSOR_CORRECTION, TUNE, SERVICE]+ The attributes of CLASS are specified in Table 139. |
后面的，Table 139的内容为：
Table 139 – CLASS attributes
Usage | Attribute | Description |
s | ALARM | specifies that VARIABLE contains alarm limits |
s | ANALOG_INPUT | specifies that VARIABLE is part of an analog input block |
s | ANALOG_OUTPUT | specifies that VARIABLE is part of an analog output block |
s | COMPUTATION | specifies that VARIABLE is part of a computation block |
s | CONTAINED | specifies that VARIABLE represents the physical characteristics of the device |
s | CORRECTION | specifies that VARIABLE is part of the correction block |
s | DEVICE | specifies that VARIABLE represents the physical characteristics of the device |
s | DIAGNOSTIC | specifies that VARIABLE indicates the device status |
s | DIGITAL_INPUT | specifies that VARIABLE is part of a digital input block |
s | DIGITAL_OUTPUT | specifies that VARIABLE is part of a digital output block |
s | DISCRETE_INPUT | specifies that VARIABLE is part of a discrete input block |
s | DISCRETE_OUTPUT | specifies that VARIABLE is part of a discrete output block |
s | DYNAMIC | specifies that VARIABLE is modified by the device without stimulus from the network |
s | FREQUENCY_INPUT | specifies that VARIABLE is part of a frequency input block |
s | FREQUENCY_OUTPUT | specifies that VARIABLE is part of a frequency output block |
s | HART | specifies that VARIABLE is part of the HART block which characterize the HART interface. There is only one HART block |
s | INPUT | specifies that VARIABLE is part of an input block. An input block is a special kind of computation block which does unit conversions, scaling, and damping. The parameter of the input block parameters can be determined by the output of another block |
s | LOCAL | specifies that VARIABLE is locally used by the EDD application. Local VARIABLEs are not stored in a device, but they can be sent to a device |
s | LOCAL_DISPLAY | specifies that VARIABLE is part of the local display block. A local display block contains the VARIABLEs associated with the local interface (keyboard, display, etc.) of the device |
s | OPERATE | specifies that VARIABLE is used to control a block’s operation |
s | OUTPUT | specifies that VARIABLE is part of the output block. The values of output VARIABLEs may be accessed by another block input |
s | SERVICE | specifies that VARIABLE is used when performing routine maintenance |
s | TUNE | specifies that VARIABLE is used to tune the algorithm of a block |
【总结】
还是找官网的东西靠谱，和详细。
转载请注明：在路上 » 【记录】如何找到EDDL的语法中的CLASS的全部类型的值，包括CONTAINED,DYNAMIC等