Gateway Control Byte; Bit 7 (Msb): Emcy Toggle Bit; Bit 6: Set Operational Toggle Bit; Bit 5: Rtr - Request To Response - DEUTSCHMANN AUTOMATION UNIGATE CX-PROFINET 2Port - CANopen Manual

Implemented protocols in UNIGATE® CX C4Map
7.1.2.5

Gateway Control Byte

Some properties of the gateway can be controlled by fieldbus data. For this purpose, the infor-
mation must be transferred from the fieldbus to the gateway, i.e. it must be in the gateway's
entrance area. The data can only be evaluated by the gateway if this information is mapped from
the fieldbus to the gateway.
Settings Gateway Control Byte
Gateway Control Byte
Bit 7 Bit 6
EMCY Set OP
toggle bit toggle bit
7.1.2.6

Bit 7 (MSB): EMCY Toggle Bit

With this bit, the next EMCY message can be transferred to the current data buffer, regardless of
whether the data is displayed in the fieldbus or not. The counter is decremented by 1 if it is not 0.
7.1.2.7

Bit 6: Set Operational Toggle Bit

If this bit is changed, the gateway sends the Set Operational message to the slaves. This feature
is to be used when some slaves are slower than the master and are only ready when the master
has already sent this message.
7.1.2.8

Bit 5: RTR - Request to response

With this bit (transition from 0 -> 1) RTR telegrams can be sent to all PDOs mapped as Rx. This
RTR means that the addressed PDOs are sent and thus updated in the gateway.
If the RTR functionality is used, at least 1 Rx PDO must be mapped. Furthermore, no more than
50 Rx PDOs may be mapped, otherwise an overrun will occur.
7.1.2.9

Gateway Error Byte

The current error status of the gateway itself, like the other values of the node guarding or the
slave data, can be mapped in the fieldbus.
Setting Error Byte
18
Bit 5 res.
Request to
response
Fieldbus-Gateway UNIGATE
Deutschmann Automation GmbH & Co. KG
res. res.
®
CX C4Map - PROFINET V. 1.0
res. res.
29.9.20