可以获取到以下文档：
1) sscanRecord.html：sscan记录文档。这也包含一些有关saveData的信息，把扫描数据写到磁盘的synApps客户端程序。
2）scanparmRecord.html：scanparm记录文档。
3）saveData_fileFormat.txt：由saveData写的'MDA'(多维存档)文件格式的描述。为了跨平台兼容，此文件格式使用XDR标准。
4）saveData.req：告诉saveData要做什么的文件的示例副本。
5）XDR_RFC1014.txt：一个XDR(外部数据表示)标准的描述。
6）Scans.ppt：描述这个sscan模块的ppt表示；显示如何使用sscan记录；描述saveData的MDA文件格式；以及解释EPICS putNotify/ca_put_callback()行为如何，以及如何处理不满足EPICS执行-跟踪要求的运行链。
一、安装和构建
在获取了一个这个发行包副本后，为了在你的使用，必须按照和构建它。通常，这些步骤值需要执行一次：
1）解压这个发行包，例如，在Linux上：
[blctrl@main-machine support]$ tar -xvzf sscan-R2-11-3.tar.gz
[blctrl@main-machine support]$ ln -s sscan-R2-11-3 sscan通常在EPICS 'support'目录中做这件事，它将产生这个子目录：
[blctrl@main-machine support]$ ls -l | grep sscan
lrwxrwxrwx. 1 root root 13 Sep 12 2022 sscan -> sscan-R2-11-3
drwxr-xr-x. 10 root root 168 Sep 12 2022 sscan-R2-11-32） 编辑sscan的configure/RELEASE文件，并且设置这些路径指向你EPICS base以及其它依赖模块的安装路径。
#RELEASE Location of external products
# Run "gnumake clean uninstall install" in the application
# top directory each time this file is changed.
TEMPLATE_TOP=$(EPICS_BASE)/templates/makeBaseApp/top
SUPPORT=/usr/local/EPICS/synApps/support
-include $(TOP)/../configure/SUPPORT.$(EPICS_HOST_ARCH)
#If using the sequencer, point SNCSEQ at its top directory:
SNCSEQ=$(SUPPORT)/seq
# EPICS_BASE usually appears last so other apps can override stuff:
EPICS_BASE=/usr/local/EPICS/base
-include $(TOP)/../configure/EPICS_BASE.$(EPICS_HOST_ARCH)
#Capfast users may need the following definitions
#CAPFAST_TEMPLATES=
#SCH2EDIF_PATH=
# These lines allow developers to override these RELEASE settings
# without having to modify this file directly.
-include $(TOP)/../RELEASE.local
-include $(TOP)/../RELEASE.$(EPICS_HOST_ARCH).local
-include $(TOP)/configure/RELEASE.local3） 返回到sscan模块的顶层目录，并且执行make，并且检查是否存在任何编译错误。
[blctrl@main-machine sscan]$ make
make -C ./configure install
...
make[1]: Leaving directory '/usr/local/EPICS/synApps/support/sscan-R2-11-3/sscanApp'
二、在一个EPICS IOC中sscan模块的用法
sscan模块不是用于直接运行一个IOC应用程序，而是为一个IOC应用程序贡献代码库，数据库，MEDM显示窗口等。SynApps包含了一个示例IOC应用程序(xxx模块)，此模块从sscan模块抽取软件并且在一个IOC中部署它。
在一个IOC应用程序("sscan_ex")中使用sscan模块代码的必需步骤如下：
1) 按如下步骤，构建这个程序框架：
[root@main-machine exer]# mkdir sscan_ex
[root@main-machine exer]# cd sscan_ex/
[root@main-machine sscan_ex]# makeBaseApp.pl -t ioc sscan_ex
[root@main-machine sscan_ex]# makeBaseApp.pl -i -t ioc sscan_ex
Using target architecture linux-x86_64 (only one available)
The following applications are available:
sscan_ex
What application should the IOC(s) boot?
The default uses the IOC's name, even if not listed above.
Application name?
[root@main-machine sscan_ex]# ls
configure iocBoot Makefile sscan_exApp2） 在这个程序的configure/RELEASE下，包含这以下行：
SUPPORT=/usr/local/EPICS/synApps/support
# If using the sequencer, point SNCSEQ at its top directory:
ASYN=$(SUPPORT)/asyn
SSCAN=$(SUPPORT)/sscan
SNCSEQ = $(SUPPORT)/seq
3）在/sscan_ex/sscan_exApp/src路径下，编辑Makefile：
TOP=../..
include $(TOP)/configure/CONFIG
#----------------------------------------
# ADD MACRO DEFINITIONS AFTER THIS LINE
#=============================
#=============================
# Build the IOC application
PROD_IOC = sscan_ex
# sscan_ex.dbd will be created and installed
DBD += sscan_ex.dbd
# sscan_ex.dbd will be made up from these files:
sscan_ex_DBD += base.dbd
# Include dbd files from all support applications:
sscan_ex_DBD += sscanSupport.dbd
sscan_ex_DBD += sscanProgressSupport.dbd
# Add all the support libraries needed by this IOC
sscan_ex_LIBS += sscan scanProgress
# sscan_ex_registerRecordDeviceDriver.cpp derives from sscan_ex.dbd
sscan_ex_SRCS += sscan_ex_registerRecordDeviceDriver.cpp
# Build the main IOC entry point on workstation OSs.
sscan_ex_SRCS_DEFAULT += sscan_exMain.cpp
sscan_ex_SRCS_vxWorks += -nil-
# Add support from base/src/vxWorks if needed
#sscan_ex_OBJS_vxWorks += $(EPICS_BASE_BIN)/vxComLibrary
# Finally link to the EPICS Base libraries
sscan_ex_LIBS += $(EPICS_BASE_IOC_LIBS)
#===========================
include $(TOP)/configure/RULES
#----------------------------------------
# ADD RULES AFTER THIS LINE4）通过在st.cmd中以下行装载数据库standardScans和saveData：
dbLoadRecords("$(SSCAN)/sscanApp/Db/standardScans.db","P=SSCAN-EX:,MAXPTS1=2000,MAXPTS2=1000,MAXPTS3=1000,MAXPTS4=10,MAXPTSH=2000")
dbLoadRecords("$(SSCAN)/sscanApp/Db/saveData.db","P=SSCAN-EX:")
dbLoadRecords("$(SSCAN)/sscanApp/Db/scanProgress.db","P=SSCAN-EX:scanProgress:")5）如果你使用autosave，在你的autosave request文件中包含standardScans_settings.req和saveData_settings.req：
file standardScans_settings.req P=$(P)
file saveData_settings.req P=$(P)6）通过编辑saveData.req告诉saveData如何初始化，并且放置它在ioc的启动目录。通常，此文件中你修改的唯一部分是标记为[extraPV]的部分。在这部分，输入你想要saveData在每个扫描数据文件中要包含的PV的名称。如果一个PV未被其记录的.DESC字段明确地注释，你可以追加你自己地描述。
7）通过在st.cmd中iocInit后，包含以下行，初始化saveData：
saveData_Init("saveData.req", "P=xxx:")8）在运行任何扫描前，指定saveData写扫描数据文件到哪里。打开medm显示窗口，scan_saveData.adl并且在"File System"以及"Subdirectory"字段中填写。(例如：PV的$(P)saveData_fileSystem和$(P)saveData_subDir)。
9）以上步骤完成后，切换到这个IOC的顶层目录，执行make。
10）切换到ioc启动目录，执行这个IOC程序的启动脚本：
[root@main-machine iocsscan_ex]# ../../bin/linux-x86_64/sscan_ex st.cmd启动结果：
#!../../bin/linux-x86_64/sscan_ex
< envPaths
epicsEnvSet("IOC","iocsscan_ex")
epicsEnvSet("TOP","/usr/local/EPICS/exer/sscan_ex")
epicsEnvSet("SUPPORT","/usr/local/EPICS/synApps/support")
epicsEnvSet("ASYN","/usr/local/EPICS/synApps/support/asyn")
epicsEnvSet("SSCAN","/usr/local/EPICS/synApps/support/sscan")
epicsEnvSet("CALC","/usr/local/EPICS/synApps/support/calc")
epicsEnvSet("SNCSEQ","/usr/local/EPICS/synApps/support/seq")
epicsEnvSet("EPICS_BASE","/usr/local/EPICS/base")
cd "/usr/local/EPICS/exer/sscan_ex"
## Register all support components
dbLoadDatabase "dbd/sscan_ex.dbd"
sscan_ex_registerRecordDeviceDriver pdbbase
## Load record instances
#dbLoadRecords("db/xxx.db","user=blctrl")
dbLoadRecords("/usr/local/EPICS/synApps/support/sscan/sscanApp/Db/standardScans.db","P=SSCAN-EX:,MAXPTS1=2000,MAXPTS2=1000,MAXPTS3=1000,MAXPTS4=10,MAXPTSH=2000")
dbLoadRecords("/usr/local/EPICS/synApps/support/sscan/sscanApp/Db/saveData.db","P=SSCAN-EX:")
dbLoadRecords("/usr/local/EPICS/synApps/support/sscan/sscanApp/Db/scanProgress.db","P=SSCAN-EX:scanProgress:")
cd "/usr/local/EPICS/exer/sscan_ex/iocBoot/iocsscan_ex"
iocInit
Starting iocInit
############################################################################
## EPICS R7.0.3.1
## EPICS Base built Sep 8 2022
############################################################################
recDynLinkOut: waiting for CA context
recDynLinkOut: got CA context
iocRun: All initialization complete
## Start any sequence programs
#seq sncxxx,"user=blctrl"
epics> dbl
SSCAN-EX:scan1
...
SSCAN-EX:scanActive11） 打开medm窗口，进行测试：
[blctrl@main-machine adls]$ medm -x -macro "P=SSCAN-EX:,S=scan1" scan_more.adl打开的窗口如下：
12）测试这个扫描，在以上窗口的Read和Driver中输入定位器PV名，并且指定定位器的启动位置，终点位置以及步长；在Detector中输入探测器名。
点击SCAN按钮开始扫描，结果如下：
