Siemens SINAMICS CU240S DP-F Operating Instructions Manual page 184

Communication
6.6 Communication via USS
Process Timeouts
Parameter P2014 determines the timeout in ms. A value of zero disables the timeout check.
Parameter P2014 checks the cyclic refresh of Bit10 in control word 1.
When USS is configured as command source of the drive and P2014 is not zero, Bit10 of the
received control word 1 is examined. If the bit is not set, an internal timeout counter is
incremented. If the threshold of p2014 is reached, a process timeout fault is set by the drive.
Other errors
P2025 = USS rejected
P2026 = USS character frame error
P2027 = USS overrun error
P2028 = USS parity error
P2029 = USS start not identified
P2030 = USS BCC error
P2031 = USS length error
184
Operating Instructions, 07/2008 - FW 3.2, A5E00766042B AD
Control Units CU240S