West Control Solutions KS 800 Profibus Interface Manual - Manual (Page 47)

w Service
This parameter determines the access type (write / read) Ä ID1.
Write access: F0 = Integer Read access: 0 = Integer
F1 = Real 1 = Real
Individual access
This access (code xx) can be used for reading or writing an individual value of a function.
Valid values for ID1:
Configuration as
FixPoint:
0 = integer real values are transmitted as integer (without digits behind the decimal point)
1 = real real values are transmitted as FixPoint (1 digit behind the decimal point)
Block access (tens block)
This access (code x0) can be used for reading max. nine process values (always as REAL values) of a
function.
Block acces (overall block)
This access can be used for reading or writing all parameter (code 178) and configuration data (code 179) of
a function. The following conditions are applicable to this access:
w For writing the data with ‘code B3 = 179’, the instrument must be switched to the configuration mode
(Ä see page 27 ‘OpMod’). All entered new configuration data and parameters are effective only,
when the instrument was switched back to on-line.
w All data of a message must be defined, omissions are not permissible.
w The complete message must be transmitted also, if parts of a message in the controller are not used
(HW and SW options). Checking of the non-existing data is omitted.
w With faulty block write accesses, the following is valid: a message is replied with NAK, if at least one
datum is faulty. Already valid values are accepted.
The message structure with block accesses with code B2/B3 is shown using two examples below. The order
of data to be transmitted is given in the relevant code table.
Valid values for ID1:
Configuration as FixPoint: 0, 1 Transmission of real values each as a FixPoint value
w CODE
The code identification is decimal and the range is within ‘00’...’99’
as well as ‘178’ = B2 and ‘179’ = B3.
w FBNR. (function block number)
A function block is addressed by means of a function block number. This function block number
can be within ‘0’ and ‘250’.
Function block number ranges:
0 general data for the overall instrument
1 - 99 fixed function blocks
w FKTNR (function number)
A function as a partial address of a function block is also addressed with a function number. This
function number can be within ‘0’ and ‘99’.
Function number ranges:
0 Function General
1 - 99 other functions
w TYP (function type)
A function type number is also assigned to each function block. This function type number is
within ‘0’ and ‘111’.
Function type range:
0 Function type General
1 - 111 other function types
w TIME
Timeout counter: Range 0x0000 ß TIME ß 0x7FFF
- is decremented during each PLC cycle (max. 32767)
- with 0 Timeout.
If the CPU is too fast, call up FB206/FB207 with delay via timer module.
w DWLR (Real), DWLI (Integer)
These parameters contain the relevant number of received data after a read access. With a write access,
Function modules
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