Entry |
Type |
Default |
Range |
Description |
rk512DpName |
string |
"_RK512_<num>" |
- |
This
config entry specifies the name of the internal data point
of type _RK512 (Type: string). Normally the name
is "_RK512_<num>". In a redundant
system, the names of the two drivers must be different
and the following entries are required:
[rk512]
(host1) rk512DpName = "_RK512_<num>"
(host2) rk512DpName = "_RK512_2_<num>" |
devicename
|
string |
"" |
- |
Specifies
the name of the serial interface for communication with
the PLC. This entry must be present. Communication is
in accordance with RS232 via a simple 3-wire cable.
Example:
Assigns
the interface with the name /dev/tty00 to the
driver.
devicename = "/dev/tty00" |
device |
string
string |
"" |
- |
This
config entry specifies the name of the serial interface
and the associated settings. The entry is only relevant
under Windows. It should not be used in conjunction with
"baudrate" or "parity".
device = "COM1"
"9600,e,8,1" # No handshaking
device = "COM1" "9600,e,8,1,p" # Hardware
handshaking
Settings
for 9600 baud, even parity, 8 bits, 1 stop bit; p enables
handshaking. |
drvGQ
|
string |
"" |
- |
Specifies
the data point name that initiates a general query. Every
time this data point is sent, it causes the driver to
poll all the data points configured as inputs, and to
pass on the values to the WinCC OA
system. A sensible choice of data point name is _Driver_num.GQ, where num is the
driver number. The data point element type is natural
number, the value is not evaluated by the driver.
If this entry does not appear in the configuration file,
then a general query is not possible.
Example:
Every
write to _Driver_1.GQ:_original.._value initiates
a general query.
drvGQ = "_Driver_1.GQ" |
drvPollMode
|
string |
"" |
- |
Specifies
the data point name that is used to enable and disable
polling mode. A sensible choice of data name is _Driver_num.PM, where num
is the driver number. In general polling mode is only
disabled for diagnostic purposes.
Example:
If the
data point is set to 0, the driver no longer polls any
data points.
drvPollMode = "_Driver_1.PM" |
drvSQ
|
string |
"" |
- |
Specifies the data point name
that initiates a single query. If this data point is sent
and if it contains the name of a data point that has been
configured for single queries, then the single query is
performed. A sensible choice for this value is _Driver_num.SQ,
where num
is the driver number. The data point element is of type
Name.
In order to initiate a single query, the name of the corresponding
data point must be passed in _Driver_num.SQ:original..value.
If this entry does not appear in the configuration file,
then a single query cannot be executed.
Example:
If a
data point name is passed in _Driver_1.SQ:_original.._value,
the driver performs a single query for this data point.
drvSQ = "_Driver_1.SQ" |
baudrate
|
int |
9600 |
2400
- 9600; 19200 |
Specifies
the baud rate for the serial interface. The default value
is 9600. Typical values are 2400, 4800 and 9600. Used
in conjunction with an S5, the lower limit for the transmission
rate is 2400 baud with an upper limit of 9600 baud. 19200
baud is only supported by the S5 under certain conditions.
Example:
Sets
the baud rate to 9600 baud.
baudrate = 9600 |
parity
|
string |
"even" |
"even","odd","none" |
Sets
the parity for the serial interface. Possible values are
"even", "odd" and "none".
The default value is "even". An even
parity is set by the PLC. Thus any other setting is only
advisable if the RK512 protocol is to be used for communicating
with a specific device.
Example:
Sets
the parity to odd.
parity = "odd" |
pollMode
|
bool |
1 |
0|1 |
Enables
or disables polling. Possible values are 0, polling disabled,
or 1, polling enabled. The default value is 1 meaning
data points are polled. This setting can be changed at
runtime by writing to the data point specified under drvPollMode.
Example:
Disables
data point polling.
pollMode = 0 |
priority
|
string |
"low" |
"high"|"low" |
Specifies
the priority of the driver in the event of an initialization
conflict. Possible values are "low"
and "high". The default value is "low".
If the PLC and driver try to send a message at the same
time, the priority is used to decide which device is actually
allowed to send the message. The priority is set on the
PLC in the hardware. The opposite priority must be set
for the driver. |
connRetries
|
int |
6 |
>=
0 |
Specifies
the number of repeat attempts to establish a connection
to the PLC in order to send a message. Possible values
are all natural numbers including 0. The default value
is 6. Normally this value must not be changed.
Example:
Sets
the number of retries to 8.
connRetries = 8 |
sendRetries
|
int |
6 |
>=
0 |
Specifies
the number of repeat attempts to send a message to the
PLC after successfully connecting. Possible values are
all natural numbers including 0. The default value is
6. Normally this value must not be changed.
Example:
Sets
the number of retries to 8.
sendRetries
= 8 |
TVZ |
float |
5.0 |
>=
5.0 |
This
config entry TVZ (message delay time) specifies the time
in seconds (float, default 5 sec, range > 5)
within which a message must be received in response to
a command message. The value should be at least twice
as great as the QVZ (acknowledgement delay time), so that
the PLC has sufficient opportunity to detect a timeout
and to repeat its response message.
[rk512]
TVZ = 6.5 |
QVZ
|
float |
2.0 |
>=
2.0 |
Specifies
the time in seconds within which connection or disconnection
must be acknowledged by the PLC. The default value is
2.0 seconds. If the 3964 protocol is used instead of the
3964R, this value should be set to 0.55 seconds. Since
this setting only concerns the driver but not the PLC,
smaller values should not be used.
Example:
Sets
the acknowledgement delay time to 0.55
seconds.
QVZ
= 0.55 |
ZVZ
|
float |
0.220 |
>=
0.220 |
Specifies
the time in seconds within which another character in
a message must be received. If this character fails to
appear, an error code is sent to the PLC. The default
value is 0.22 seconds. Since this setting only concerns
the driver but not the PLC, smaller values should not
be used. Normally the default setting must not be changed.
Example:
Sets
the character delay time to 0.30 seconds.
ZVZ =
0.30 |
3964R
|
int |
1 |
0|1 |
This
setting is used to switch between the 3964 and 3964R protocols.
The 3964R protocol differs from 3964 by having a longer
acknowledge delay time and an additional checksum in the
messages. Possible values are '0' for 3964 and '1' for
3964R.
Example:
Protocol
3964 will be used.
3964R
= 0 |
talas
|
string |
"No" |
"Yes"|"No" |
This
entry defines whether the driver will be docked to a TALAS computer (default = no).
In this case always entire data blocks are read out. The
first words contain the source time of the data, the data
is followed by a status word. |
floatIsIEEE |
string |
"No" |
"Yes"|"No" |
This
entry defines whether float values are transmitted
with the IEEE format or with the RK512 specific format.
By default it is the RK512 specific format. Since with
most PLCs the IEEE format is used, the entry floatIsIEEE
= "Yes" must be registered in the config file. |
restartFetchOnError |
string |
"No" |
"Yes"|"No" |
This
config entry (type: string, default: "No")
defines whether, in the event of a transmission error
in the message direction (data being transferred from
PLC to driver), it should start again with a command message
(the first message) ("Yes") or whether a follow-on
message can be repeated. |
restartSendOnError |
string |
"No" |
"Yes"|"No" |
This
config entry (type: string, default: "No")
defines whether, in the event of a transmission error
in the command direction (data being transferred from
driver to PLC), it should start again with a command message
(the first message) ("Yes") or whether
a follow-on message can be repeated. |
Example
of a config file