6-34 Settings Date Code 20010518
SEL-2020 Instruction Manual
Table 6.14: Set U User-Defined Command Settings (continued)
Setting Comment
READNACK
Prompt. Read data error response.
Description. You define the response string the SEL-2020 uses if a read operation is not
successful. This setting is only available if STR_EN is set to Y (Yes). This response
string is limited to 1000 characters.
WRITE
Prompt. Write data.
Description. You define the character sequence the SEL-2020 watches for to perform a
data write operation. Must include \P.../, \A.../ and \D.../ strings. This setting is only
available if STR_EN is set to Y (Yes). This string is limited to 40 characters.
WRITEACK
Prompt. Write data success response.
Description. You define the response the SEL-2020 uses if a write operation is
successful. This setting is only available if STR_EN is set to Y (Yes). This response
string is limited to 1000 characters.
WRITENACK
Prompt. Write data error response.
Description. You define the response the SEL-2020 uses if a write operation is
unsuccessful. This setting is only available if STR_EN is set to Y (Yes). This response
string is limited to 1000 characters.
Note: If CMD_CH is set to <CR>, the SEL-2020 will ignore non-printing characters entered on the port.
Therefore, you should not use non-printing characters in user-defined commands unless you change
the termination character.
SET L - LOGIC SETTINGS
Use the SET L command to establish the SELOGIC Control Equations that control the
intermediate breaker and remote bit logic. There are a total of 64 bits that can be directly
controlled by these equations. These elements act as inputs to 32 S-R latches, whose outputs are
also available for use in SEL
OGIC. On SEL IED ports, these bits can be associated with IED
breaker and remote bit operation, as discussed earlier in this section. The operation of these
latches is more fully described in Section 7: SEL
OGIC Control Equations.
Table 6.15 fully describes these settings.
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