Siemens SINUMERIK 840D Series Diagnostics Manual page 544

1 Alarms
Definitions:
Reactions:
Remedy:
Program Continuation:
301715
Parameters:
Definitions:
Reactions:
Remedy:
Program Continuation:
301716
Parameters:
Definitions:
1-544
Configuration of the direct measuring system is faulty for SSI encoder: MD_1041
$MD_NO_TRANSMISSION_BITS_DM (SSI transmission length) is smaller than the num-
ber of all parameterized bits in MD_1031 $MD_ENC_ABS_TURNS_DIRECT (multiturn),
MD_1032 $MD_ENC_ABS_RESOL_DIRECT (singleturn) and MD_1037
$MD_ENC_CONFIG_DIRECT Bit 14 (alarm bit) and MD_1037
$MD_ENC_CONFIG_DIRECT Bit 12 (parity bit).
- Mode group not ready.
- Channel not ready.
- NC Start disable in this channel.
- NC Stop on alarm.
- Alarm display.
- Interface signals are set.
• Set parameters correctly for all associated machine data:
• MD_1041 $MD_NO_TRANSMISSION_BITS_DM (SSI transmission length): number of
bits in an SSI protocol, including all bits such as alarm bit and parity bit.
• MD_1031 $MD_ENC_ABS_TURNS_DIRECT (multiturn): number of resolvable revolu-
tions
• MD_1032 $MD_ENC_ABS_RESOL_DIRECT (singleturn): number of increments per
revolution
• MD_1037.Bit 12 $MD_ENC_CONFIG_DIRECT.Bit 12: parity bit
• MD_1037.Bit 14 $MD_ENC_CONFIG_DIRECT.Bit 14: alarm bit
• Example:
• SSI encoder with 25 bits transmission length, 12 bits multiturn, 12 bits singleturn, one
alarm bit:
• $MD_NO_TRANSMISSION_BITS_DM = 25
• $MD_ENC_ABS_TURNS_DIRECT = 4096
• $MD_ENC_ABS_RESOL_DIRECT = 4096
• $MD_ENC_CONFIG_DIRECT.Bit 14 = 1
• $MD_ENC_CONFIG_DIRECT.Bit 12 = 0
Switch control OFF - ON.
Axis %1 drive %2 multiturn SSI direct measuring system invalid
%1 = NC axis number
%2 = Drive number
Configuration faulty for a linear and direct measuring system with SSI: A linear measuring
system cannot have any multiturn information.
- Mode group not ready.
- Channel not ready.
- NC Start disable in this channel.
- NC Stop on alarm.
- Alarm display.
- Interface signals are set.
Set MD_1031 $MD_ENC_ABS_TURNS_DIRECT (resolution number revolution) to 0.
Switch control OFF - ON.
Axis %1 drive %2 SSI direct measuring system without incremental signals not
possible
%1 = NC axis number
%2 = Drive number
With the present module, it is not possible to use SSI encoders without incremental sig-
nals.
SINUMERIK 840D/840Di/810D Diagnostics Guide (DA) – 11.02 Edition
 Siemens AG, 2002. All rights reserved
11.02