Special Memory Bytes Smb98 And Smb99; Smb131 To Smb165: Hsc3, Hsc4, And Hsc5 Register; Special Memory Bytes Smb130 To Smb165 - Siemens SIMATIC S7-200 System Manual

Special Memory (SM) Bits
Table C-16 Special Memory Bytes SMB86 to SMB94, and SMB186 to SMB194 (continued)
Port 0
SMB89 SMB189 End of message character
SMB90 SMB190
SMB91 SMB191
SMB92 SMB192
SMB93 SMB193
SMB94 SMB194 Maximum number of characters to be received (1 to 255 bytes).
SMB98 and SMB99
As described in Table C-17, SMB98 and SMB99 give you information about the
number of errors on the expansion I/O bus.
Table C-17 Special Memory Bytes SMB98 and SMB99
SM Byte
SMB98
SMB99

SMB131 to SMB165: HSC3, HSC4, and HSC5 Register

As described in Table C-18, SMB131 through SMB165 are used to monitor and
control the operation of high-speed counters HSC3, HSC4, and HSC5.
Table C-18 Special Memory Bytes SMB130 to SMB165
SM Byte
SMB131 to
SMB135
SM136.0 to
SM136.4
SM136.5
SM136.6
SM136.7
SM137.0 to
SM137.2
SM137.3
C-14
Port 1
Idle line time period given in milliseconds. The first character received
after idle line time has expired is the start of a new message. SM90
(or SM190) is the most significant byte and SM91 (or SM191) is the
least significant byte.
Inter-character/message timer time-out value (in milliseconds). If the
time period is exceeded, the receive message is terminated.
SM92 (or SM192) is the most significant byte, and SM93 (or SM193)
is the least significant byte.
Note: This range must be set to the expected maximum buffer size,
even if the character count message termination is not used.
This location is incremented each time a parity error is detected on the
expansion I/O bus. It is cleared upon power up, and by the user writing zero.
SMB98 is the most significant byte.
Reserved
Reserved
HSC3 current counting direction status bit: 1 = counting up
HSC current value equals preset value status bit: 1 = equal
HSC3 current value is greater than preset value status bit: 1 = greater than
Reserved
HSC3 direction control bit: 1 = count up
Description
Description
Description
S7-200 Programmable Controller System Manual
A5E00066097-02