ABB DCS 400, Manual, Page: 163 / 192

II K 7-5
Serial Interfaces
Telegram Structure
The serial communication with a PLC can be carried
out via a field bus adapter, a RS232 port or a panel
port. Irrespective of the bus protocol, these ports
communicate with the DCS400 software via specified
data sets. Four data sets are available with three 16-
bit words each. The data sets have the following
significance:
Control and reference transmission, from the PLC
to the drive
Data set 1.1: Main Ctrl Word (5 bits set by
parameter group 9)
Data set 1.2: Bus Main Ref
Data set 1.3: Bus Aux Ref
Status information and actual value transmis-
sion, from the drive to the PLC
Data set 2.1: Main Status Word (4 bits set by
parameter MSW bit 1x Ass
(6.22…6.25))
Data set 2.2: Actual value 1 (set by param.
Dataset 2.2 As (6.20))
Data set 2.3: Actual value 2 (set by param.
Dataset 2.3 As (6.21))
Digital and analogue value transmission, from the
PLC to the drive
Data set 3.1: DO1...DO5 (set by 6.11...6.15)
Data set 3.2: AOx, Scaling: ±4096 ^ = ±10V
(set by 6.05/6.08)
Data set 3.3: AOx, Scaling: ±4096 ^ = ±10V
(set by 6.05/6.08)
Actual value transmission, from the drive to the
PLC
Data set 4.1: Fld Cur Act (fixed)
Data set 4.2: Power Act (fixed)
Data set 4.3: Torque Act (fixed)
Main Status Word (2.06)
Bit Name Definition
0 RDY_ON 1 =RDY for ON
0=not RDY_ON
1 RDY_RUNNING 1=RDY for RUN
0=not RDY_RUN
2 RUNNING 1=RUNNING
0=not RUNNING
3 FAULT 1=FAULT
0=no FAULT
4 COAST_ACT 1 =not COAST
0=COAST
5 EME_STOP_ACT 1 =not EME_STOP
0=EME_STOP
6 1=
0=
7 ALARM 1=ALARM
0=no ALARM
8 AT_SETPOINT 1=Ref=Act
0=Ref<>Act
9 REMOTE 1 =Terminal/Bus
0=Local (Panel/Tool)
10 ABOVE_LIMIT 1=Speed > SpLev1 (5.16)
0=Speed < SpLev1 (5.16)
11 MSW_BIT_11_ASS Definition see
Parameter 6.22
12 MSW_BIT_12_ASS Definition see
Parameter 6.23
13 MSW_BIT_13_ASS Definition see
Parameter 6.24
14 MSW_BIT_14_ASS Definition see
Parameter 6.25
15 DDCS-Protocol
(DCS400 to Adapter)
1=DDCS fault
0=DDCS ok
Note: For a proper operation COAST and EME STOP in
the Main Control Word has to be setted to log. state 1 .
Note: In the Main Stat Word RDY ON , COAST ACT ,
EME STOP ACT and REMOTE is setted to log. state 1 ,
if Elektronics supply is on, Drive is off and no Faults ap-
pears.
Control and status word allocation
The allocation of the main control word (data set 1.1)
and the main status word (data set 2.1) is identical to
main control word (2.05) and main status word
(2.06) of the DCS 400 converter. The allocation is as
follows:
Main Control Word (2.05)
Bit Name Definition
0 * ON 1=Drive ON
0=Drive OFF
1 * COAST 1 =not COAST
0=COAST
2 * EME_STOP 1 =no EME_STOP
0=EME_STOP
3 * RUN 1=START
0=STOP
4 1=
0=
5 1=
0=
6 1=
0=
7 RESET 0>1=RESET
0 =no RESET
8 * JOG_1 1=JOG 1
0=no JOG 1
9 * JOG_2 1=JOG 2
0=no JOG 2
10 1=
0=
11 MCW_BIT_11 Definition see
Parameter group 9
12 MCW_BIT_12 Definition see
Parameter group 9
13 MCW_BIT_13 Definition see
Parameter group 9
14 MCW_BIT_14 Definition see
Parameter group 9
15 MCW_BIT_15 Definition see
Parameter group 9
* effective when Cmd Location (2.02) = Bus; all others are
independent from Cmd Location.