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GEM for SIPLACE V7.01 Page 96 of 251 ©Siem ens AG, all rights reserved The LVACK data item gives inf orm ation to the Host about the s tatus of s etting a specif ic variable when the request to set it is unsucces sful. L…
GEM for SIPLACE V7.01
©Siemens AG, all rights reserved page 95 of 251
If any of the limits proposed in S4F45 are invalid, all limits for all variables in this message
are rejected. The following message is sent in the event of an error:
S4F46 * H <- E
<L [2]
<B [1] VLAACK>
<L
<L [3]
<U4 VID>
<B [1] 0x00> * LVACK
<L [2]
<B [1] LIMITID>
<B [1] LIMITACK>
>
>
...
>
> .
Data item VLAACK reports to the Host the status of the request to define limits for the
requested variables.
VLAACK Description
0x00 OK. Limits successfully defined.
0x01 Limit attribute definition error.
GEM for SIPLACE V7.01
Page 96 of 251 ©Siemens AG, all rights reserved
The LVACK data item gives information to the Host about the status of setting a specific
variable when the request to set it is unsuccessful.
LIMIT-
ACK
Description
0x01 Requested variable does not exist.
0x02 Variable is not eligible for limits definition.
0x03 Requested variable was repeated in request
message.
0x04 Error in setting limit due to reason specified in
LIMITACK.
The LIMITACK data item indicates the status of an attempt to set an individual limit for a
variable.
VLACK Description
0x01 LIMITID does not exist.
0x02 Requested UPPERDB is greater than LIMITMAX.
0x03 Requested LOWERDB is lower than LIMITMIN.
0x04 UPPERDB < LOWERDB
0x05 Illegal format specified for UPPERDB or
LOWERDB.
6)9DULDEOH/LPLW$WWULEXWH5HTXHVW
S2F47 W * H -> E
<L
<U4 VID> * Requested Variable ID
...
> .
The Host sends this message to the Equipment to request the limits attributes for specific
variables. The Host may request the limits attributes for all defined variables with the
following message.
S2F47 W * H -> E
<L> .
In response to this message, the Equipment reports all limits attributes for all variables. If
a variable is eligible for limits monitoring, but does not have any limits defined, it is not
reported.
GEM for SIPLACE V7.01
©Siemens AG, all rights reserved page 97 of 251
6)9DULDEOH/LPLW$WWULEXWHV6HQG
S2F48 * H <- E
<L
<L [2]
<U4 VID> * Variable ID
<L [4]
<A UNITS> * Units of Measure
<LIMITMIN> * Minimum Limit
<LIMITMAX> * Maximum Limit
<L * Up to 7 Possible
<L [3]
<B [1] LIMITID> * Limit ID
<UPPERDB> * Upper Deadband
<LOWERDB> * Lower Deadband
>
...
>
>
>
...
> .
The Equipment sends this message in response to a Host S2F47 and reports the
characteristics of limits for specified variables. In response to a request from the Host for
all limits for all variables, only variables with limits defined are reported. If the Host
requests specific variables which are not eligible for limits monitoring, the following
message will be reported for that variable:
S2F48 * H <- E
<L
<L [2]
<U4 VID> * Variable ID
<L> * Not eligible for Limits
>
...
> .