Chapter 7. Response Time Monitor; Feature Description; Microcode Support; Iml Testing - IBM 3274 51C Maintenance Information

Chapter 7. Response Time Monitor Feature
7.1 Feature Description
The Response Time Monitor (RTM) card, and its associated
microcode, interfaces with the 3274 control logic card.
The RTM card provides the means whereby a customer can
differentiate between good and bad responses, as well as
questionable ones. The RTM feature measures and records
the transaction times of inbound host attention operations
from display stations that communicate with the host.
Depending on how the 3274 is customized, the RTM
feature obtains information from a network management
application in the host, from a subsystem display operator,
or both.
When the RTM feature support is customized in the 3274, a
series of five counters is allocated for each configured
device or logical terminal, representing intervals into which
the various times are mapped. During the customizing
process, up to four counters may be set up by specifying
the boundaries (maximum times) associated with each
response. By properly specifying boundary values, a
customer can obtain a distribution of responses for each
logical terminal in his network.
The operator of an authorized display can retrieve and
display the RTM logs of all configured devices in his
network. By the operator's performing the A4/1 Test, the
log information is displayed for eight logical terminals at
a time, until all device logs have been displayed. See
3274 Control Unit Models 51C, 52C, and 61C Maintenance
Concepts, SY27·2528.
7.2 Microcode Support
the RTM feature is supported by Microcode Configuration
Supports C and D only. The D support requires that a two-
sided diskette drive (51 TD) be installed.
7.3 IML Testing
When a 3274 contains the RTM feature and is customized
for RTM, a normal IML, using the system/load diskette,
will perform a functional test of RTM card No. 11. If this
test fails, a blinking 1011 code will be displayed in the
3274 8 4 2 1 indicators.
When the IML is completed and the operational code is
loaded, any RTM adapter errors detected by the
operational code will generate a solid 1011 code in the
3274 8 4 2 1 indicators. These errors will also generate
nnn code 382 on all attached displays.
Chapter 7. Response Time Monitor Feature 7-1