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PAM-199-P-PFN
7.4 IO Description
The demand values are set in a range up to 0x3FFF (16383 for 100%) and reported the same way.
For the control and status bits “1” means activation respective activity.
Error bits are
displayed inverted because a “0” reports an active error.
Some bits and bytes depend on the function mode of the device. So there are demand and feedback values in
the range +/-
100% in mode 195 which are used in the range 0… 100% for channel A in mode 196 when hav-
ing additional same signals for channel B. Similar behavior with control and status bits. The changes and addi-
tional data, only active in
two channel mode 196
, are
marked grey
in the following description.
The module is controlled with a control word consisting of following bits
ENABLE (
A
)
General
activation of the system (
of channel A in mode 196
) linked with the hard-
ware enable.
ENABLE B
Activation of channel B in mode 196 linked with the hardware enable.
PARAREAD
Reads out the value of the parameter which is determined by PARA ADDRESS and
returns this value in PARA VALUE of the data sent to the fieldbus. If the address is
not valid the function will return
„0xffffffff“.
PARAMODE
Enables the ability to set parameters
PARA VALID
Parameter value is transmitted at the rising edge
LIVEBIT IN
If this Bit is set
in the “Ready” – State of the module, an internal watchdog function
will be activated. In the further course it is monitored if there is a value change in the
data received by the bus at least once per second. This could be e.g. this bit. If there
is a period longer than 1s without data change, the “Ready” – State of the module
will be deactivated. The value read here will be returned by the bit “LIVEBIT OUT” in
the status word, so the connected PLC can also monitor the status of the communi-
cation.
Further data words to the module:
DEMAND VALUE (
A
)
Target value for controlling the valve (
for channel A in mode 196
)
DEMAND VALUE B
Target value for controlling the valve for channel B in mode 196
PARA VALUE
Parameter value which should be transmitted
PARA ADDRESS
Address of the parameter which should be changed or read out
