0X1031 Modbus Connection Mode Register; 0X1131 Modbus Connection Timeout In Sec; 0X1132 Check Reference List Prior To Data Exchange; 0X1133 Process Alarm - Emerson PACSystems RSTi-EP User Manual

User Manual
GFK-2958J
In default setting the force mode can be enabled via the web server (after Login). The force
mode can be locked by writing the double word "LOCK" (0x4C4F, 0x434B). Writing of
"FREE" (0x4652, 0x4545) will unlock the force mode again.

0x1031 MODBUS CONNECTION Mode Register

Bit Name/Description
2 to 15 reserved
1 MB_ImmediateWritePermission
– 0: during the first write access, write authorization is requested for the corresponding Modbus connection.
If this is not successful, an exception response with the exception code 0x01 is generated. If it is successful,
the write access is executed and write authorization remains in effect until the end of the connection.
– 1: write authorization for the corresponding Modbus connection is already requested when the connection
is being established. As a result, the first Modbus connection receives the write authorization, and nothing
happens for all those that follow (as long as Bit 0 = 1).
0 MB_OnlyOneWritePermission
– 0: all Modbus connections have written authorization
– 1: in all cases only one Modbus connection can be assigned write authorization. Once assigned, write
authorization is retained until there is a disconnect. After the connection that has write authorization is
disconnected, the next connection which attempts write access receives write authorization.

0x1131 MODBUS CONNECTION Timeout in Sec

This register determines how long a Modbus connection must be inactive before it is ended
with a disconnect.

0x1132 Check Reference List prior to Data Exchange

If the value in register 0x1132 is set to 0, the data exchange begins without checking the
reference module list (0x2800 and the following) against the current module list (0x2A00
and the following). The reference module list must also not be described.
If the value in in register 0x1132 is set to 1, the data exchange only starts if the reference
module list (0x2800 and the following) matches the current module list (0x2A00 and the
following).

0x1133 Process Alarm

If the value in this register is set to 0, process alarms are reported, but it is not necessary to
confirm or read them. If the value in this register is set to 1, process alarms are reported, and
they must be confirmed by reading the corresponding register.

0x1134 Diagnostic Alarm

If the value 0 is set in this register, the diagnostic alarm is deactivated. Pending diagnostics
do not have any effect on the exchange of process data and must not be confirmed. They
are, however, displayed locally on the RSTi-EP hardware with red LEDs (SF and module) and
may also be read in the module-specific diagnostic registers 0xAXXX.
Detailed Descriptions of the Fieldbus Network Adapters
Chapter 4
Oct 2019
91