Siemens Simovert Masterdrives Compendium page 346

Communication / PROFIBUS
8.2.2.4 Acyclical master class 2 - Configuration (DriveES)
MSAC_C2 channel
for the Drive ES
SIMATIC S7
DPM1
Profibus DP
8.2-16
The MSAC_C2 channel on the CBP must be reserved for the start-up
and service tool Drive ES.
MSAC_C2
SIEM ENS
A
MASTERDRIVES
S1
X1 01 B
X1 03 C
Fig. 8.2-7 Drive ES with Profibus
6SE7087-6QX70 (Version AK)
Compendium Motion Control
09.2008
Drive ES
Basic
DPM2
Siemens AG
SIMOVERT MASTERDRIVES