diff --git a/site_ansto/anstohttp.c b/site_ansto/anstohttp.c
index 7c7c2337..8bb0d7a0 100644
--- a/site_ansto/anstohttp.c
+++ b/site_ansto/anstohttp.c
@@ -44,6 +44,7 @@ static char configure[] = {"/admin/configure.egi"};
 static char preset[] = {"/admin/presethm.egi"};
 static char dynamicsrvmodify[] = {"/admin/selectdynamicsrvmodify.egi?dynamicSRVmodifyparamname=%s&dynamicSRVmodifyparamvalue=%s"};
 static char dynamicfatmodify[] = {"/admin/selectdynamicfatmodify.egi?dynamicFATmodifyparamname=%s&dynamicFATmodifyparamvalue=%s"};
+static char dynamicxatmodify[] = {"/admin/selectdynamicxatmodify.egi?dynamicxATmodifyparamname=%s&dynamicxATmodifyparamvalue=%s"};
 static char devName[32] = "histmem";
 /*====================================================================
   error codes
@@ -311,8 +312,11 @@ static int AnstoHttpConfigure(pHistDriver self, SConnection *pCon,
    		char modify_http_request[1024]="";
    		if (strncasecmp(pItem,"SRV_",4)==0)
    			sprintf(modify_http_request,dynamicsrvmodify,pItem+4,pValue);
-   		if (strncasecmp(pItem,"FAT_",4)==0)
+   		else if (strncasecmp(pItem,"FAT_",4)==0)
    			sprintf(modify_http_request,dynamicfatmodify,pItem+4,pValue);
+		// MJL 3/12 General (hierachical) xAT section attribute or table element e.g. CAT:MESYTEC_MPSD8_THRESHOLDS.0
+   		else if (pItem[0]&&strncasecmp(pItem+1,"AT:",3)==0) // e.g. FAT: BAT: OAT: CAT: etc.
+   			sprintf(modify_http_request,dynamicxatmodify,pItem,pValue); // preserve full hierachical prefix (don't strip)
    		// Try committing the setting to the histogram server
    		if (*modify_http_request)
    		{