PROFINET C
YCLIC
D
ATA
F
ORMATS
PROFINET Protocol
ADVANCED MICRO CONTROLS INC.
84
Encoder Control Word (STW2_ENC)
STW2_ENC is one of the two control words cyclically written to the NR60E2. Only bits 15 through 12, and
10, are used by the NR60E2.
Figure R7.2 G1_STW Format
Bits 15-12: Controller Sign-of-Life –
These bits are used by the NR60E2 to ensure stable communications
between the NR60E2 and the controller.
Bit 10: Control by PLC –
This bit is a handshake response to the
Control Requested
bit from the NR60E2.
(ZSW2_ENC.9, see below.) It is a signal to the NR60E2 that data being sent to it by the controller is
valid.
The
Control Requested / Control by PLC
mechanism is only used when Compatibility Mode is
disabled. (The NR60E2 is configured as a V4.1 encoder.) When in Compatibility Mode and
the NR60E2 is acting as a V3.1 encoder, and this functionality is ignored and the NR60E2 will
always respond to data from the controller.
Sensor Status Word (G1_ZSW)
G1_ZSW is one of two control words cyclically written from the NR60E2 to the controller. Only bits 15
through 11 are used by the NR60E2.
Figure R7.3 G1_ZSW Format
Bit 11: Requirement of error acknowledgement detected –
This bit is used to initiate a handshake with
the controller to ensure that an error signal from the NR60E2 is recognized and acknowledged. The
controller must set the
Acknowledging a sensor error
bit, G1_STW.15, to acknowledge the error sig-
nal. The NR60E2 will respond by resetting the
Requirement of error acknowledgement detected
bit.
The sensor error bit, G1_ZSW.15, will remain active as long as an error exists.
Bit 12: Set/shift of home position executed –
This bit is used in conjunction with
Request set/shift of
Home position,
G1_STW.12. A 0
1 transition on this bit indicates that the NR60E2 has successfully
applied the requested preset/offset of the current position.
Bit 13: Transmit absolute value cyclically –
When this bit is set to “1”, the G1_XIST2 signal contains the
absolute position value. If this bit is reset to “0”, the G1_XIST2 signal is either an error code, or zero.
If the G1_XIST2 signal contains an error code, G1_ZSW.15 will be set to “1”.
Bit
15
Bit
14
Bit
13
Bit
12
Bit
11
Bit
10
Bit
9
Bit
8
Bit
7
Bit
6
Bit
5
Bit
4
Bit
3
Bit
2
Bit
1
Bit
0
0
0 0 0 0 0 0 0
0
0
N
Reserved. Must be zero.
Control by PLC
Controller Sign-Of-Life
Reserved. Must be zero.
Reserved. Must be zero.
Not Applicable. Features not required/implemented.
Bit
15
Bit
14
Bit
13
Bit
12
Bit
11
Bit
10
Bit
9
Bit
8
Bit
7
Bit
6
Bit
5
Bit
4
Bit
3
Bit
2
Bit
1
Bit
0
0 0 0 0 0 0 0 0 0
0
0
Not Applicable. Features not required/implemented.
Reserved. Will be zero.
Requirement of error acknowledgement detected
Set/shift of home position executed
Transmit absolute value cyclically
Parking sensor active
Sensor error
Содержание NR60E2
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