Dual Slave Mode - Siemens SINAMICS G110M Function Manual

Communication via AS-i - only for G110M

7.3 Dual Slave mode

7.3 Dual Slave mode
In Dual Slave mode, eight bits are available for the communication between the AS-i master
and the inverter. The eight bits are used to transfer process data. In parallel, the control can
start a diagnostic request via AS-i.P0.
The following default settings are possible:
● Default setting 31: Dual Slave mode with fixed setpoints
● Default setting 34: Dual Slave mode with setpoint via AS-i field bus
Default setting 31: Dual Slave mode with fixed setpoints
The control accesses the two slaves of the inverter each via four bits.
Via slave 2, in accordance with profile 7.A.E, the control specifies the speed setpoint via the
motor control bits (AS-i.DO0 ... AS-i.DO2).
Via slave 1, the control sends data in cyclical or acyclical mode, in accordance with profile
7.A.5.
The control requires one bit per slave in order to specify the slave.
Default setting 31, slave 2 with profile 7.A.E: Control -> inverter
• AS-i.DO0
• AS-i.DO1
• AS-i.DO2
• AS-i.DO3
(Page 210).
If the control specifies the speed setpoint, the inverter replies:
Default setting 31, slave 2 with profile 7.A.E: Inverter -> control
• p2080[0] = 53.13
• p2080[1] = 899.11
• p2080[2] = 722.0
• p2080[3] = 722.1
If the control sends a diagnostic request via AS-i.P0, the inverter replies with the currently
pending fault or alarm messages.
master (Page 210).
Default setting 31, slave 1 with profile 7.A.5: Control -> inverter
• AS-i.DO0
206
-> p1020.0 = 2093.0
-> p1021.0 = 2093.1
-> p1022.0 = 2093.2
-> Select slave A or slave B, interconnected internally
Table 7-4 Fixed speeds via the motor control bits and response in the inverter
PLC ready to switch on
Pulses enabled
State DI0
State DI1
Table 7-5 Alarm and fault messages via RP0 ... RP3 from the inverter to the AS-i
-> Time signal for the CTT2 transfer from the AS-i master
Fixed speed bit 0
Fixed speed bit 1
Fixed speed bit 2
-> AS-i.DI0
-> AS-i.DI1
-> AS-i.DI2
-> AS-i.DI3
Function Manual, 01/2016, FW V4.7 SP6, A5E34229197B AC
Fieldbuses